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Finding the Fourth Proportional to 718,252.50, 991,162.92 and 391,558.74

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Solution

The fourth proportional to 718,252.50, 991,162.92 and 391,558.74 is: 540,337.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,252.50 : 991,162.92 = 391,558.74 : x
  2. Step 2: Convert to fraction form
    718,252.50/991,162.92 = 391,558.74/x
  3. Step 3: Cross multiply
    718,252.50x = 991,162.92 × 391,558.74
  4. Step 4: Simplify right side
    718,252.50x = 388,098,504,089.92
  5. Step 5: Solve for x
    x = 388,098,504,089.92/718,252.50
  6. Step 6: Final answer
    x = 540,337.14

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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.