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Finding the Fourth Proportional to 407,717.28, 607,442.76 and 387,641.16

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Solution

The fourth proportional to 407,717.28, 607,442.76 and 387,641.16 is: 577,532.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,717.28 : 607,442.76 = 387,641.16 : x
  2. Step 2: Convert to fraction form
    407,717.28/607,442.76 = 387,641.16/x
  3. Step 3: Cross multiply
    407,717.28x = 607,442.76 × 387,641.16
  4. Step 4: Simplify right side
    407,717.28x = 235,469,816,120.00
  5. Step 5: Solve for x
    x = 235,469,816,120.00/407,717.28
  6. Step 6: Final answer
    x = 577,532.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.