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Finding the Fourth Proportional to 715,264.88, 987,066.88 and 392,972.24

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Solution

The fourth proportional to 715,264.88, 987,066.88 and 392,972.24 is: 542,302.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,264.88 : 987,066.88 = 392,972.24 : x
  2. Step 2: Convert to fraction form
    715,264.88/987,066.88 = 392,972.24/x
  3. Step 3: Cross multiply
    715,264.88x = 987,066.88 × 392,972.24
  4. Step 4: Simplify right side
    715,264.88x = 387,889,882,863.41
  5. Step 5: Solve for x
    x = 387,889,882,863.41/715,264.88
  6. Step 6: Final answer
    x = 542,302.43

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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.