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Finding the Fourth Proportional to 518,787.67, 715,931.17 and 289,337.35

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Solution

The fourth proportional to 518,787.67, 715,931.17 and 289,337.35 is: 399,287.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,787.67 : 715,931.17 = 289,337.35 : x
  2. Step 2: Convert to fraction form
    518,787.67/715,931.17 = 289,337.35/x
  3. Step 3: Cross multiply
    518,787.67x = 715,931.17 × 289,337.35
  4. Step 4: Simplify right side
    518,787.67x = 207,145,627,510.20
  5. Step 5: Solve for x
    x = 207,145,627,510.20/518,787.67
  6. Step 6: Final answer
    x = 399,287.88

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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.