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Finding the Fourth Proportional to 518,186.98, 715,079.14 and 288,732.40

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Solution

The fourth proportional to 518,186.98, 715,079.14 and 288,732.40 is: 398,440.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,186.98 : 715,079.14 = 288,732.40 : x
  2. Step 2: Convert to fraction form
    518,186.98/715,079.14 = 288,732.40/x
  3. Step 3: Cross multiply
    518,186.98x = 715,079.14 × 288,732.40
  4. Step 4: Simplify right side
    518,186.98x = 206,466,516,282.14
  5. Step 5: Solve for x
    x = 206,466,516,282.14/518,186.98
  6. Step 6: Final answer
    x = 398,440.19

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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.