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Finding the Fourth Proportional to 715,116.32, 986,866.08 and 392,829.92

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Solution

The fourth proportional to 715,116.32, 986,866.08 and 392,829.92 is: 542,108.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,116.32 : 986,866.08 = 392,829.92 : x
  2. Step 2: Convert to fraction form
    715,116.32/986,866.08 = 392,829.92/x
  3. Step 3: Cross multiply
    715,116.32x = 986,866.08 × 392,829.92
  4. Step 4: Simplify right side
    715,116.32x = 387,670,523,257.11
  5. Step 5: Solve for x
    x = 387,670,523,257.11/715,116.32
  6. Step 6: Final answer
    x = 542,108.34

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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.