Home / 661,152.36-912,764.94-505,811.40

Finding the Fourth Proportional to 661,152.36, 912,764.94 and 505,811.40

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Solution

The fourth proportional to 661,152.36, 912,764.94 and 505,811.40 is: 698,306.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,152.36 : 912,764.94 = 505,811.40 : x
  2. Step 2: Convert to fraction form
    661,152.36/912,764.94 = 505,811.40/x
  3. Step 3: Cross multiply
    661,152.36x = 912,764.94 × 505,811.40
  4. Step 4: Simplify right side
    661,152.36x = 461,686,912,172.32
  5. Step 5: Solve for x
    x = 461,686,912,172.32/661,152.36
  6. Step 6: Final answer
    x = 698,306.38

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Double scale
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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.