Home / 811,412.54-1,216,763.76-385,070.56

Finding the Fourth Proportional to 811,412.54, 1,216,763.76 and 385,070.56

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Solution

The fourth proportional to 811,412.54, 1,216,763.76 and 385,070.56 is: 577,437.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,412.54 : 1,216,763.76 = 385,070.56 : x
  2. Step 2: Convert to fraction form
    811,412.54/1,216,763.76 = 385,070.56/x
  3. Step 3: Cross multiply
    811,412.54x = 1,216,763.76 × 385,070.56
  4. Step 4: Simplify right side
    811,412.54x = 468,539,900,311.49
  5. Step 5: Solve for x
    x = 468,539,900,311.49/811,412.54
  6. Step 6: Final answer
    x = 577,437.34

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.