Home / 912,323,205.45-1,259,030,814.03-515,905,502.13

Finding the Fourth Proportional to 912,323,205.45, 1,259,030,814.03 and 515,905,502.13

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Solution

The fourth proportional to 912,323,205.45, 1,259,030,814.03 and 515,905,502.13 is: 711,963,611.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,323,205.45 : 1,259,030,814.03 = 515,905,502.13 : x
  2. Step 2: Convert to fraction form
    912,323,205.45/1,259,030,814.03 = 515,905,502.13/x
  3. Step 3: Cross multiply
    912,323,205.45x = 1,259,030,814.03 × 515,905,502.13
  4. Step 4: Simplify right side
    912,323,205.45x = 649,540,924,309,289,728
  5. Step 5: Solve for x
    x = 649,540,924,309,289,728/912,323,205.45
  6. Step 6: Final answer
    x = 711,963,611.61

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Half scale
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Double scale
Find fourth proportional to 912,323,206.45, 1,259,030,815.41 and 515,905,503.13
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.