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Finding the Fourth Proportional to 720,545.12, 994,356.17 and 393,858.57

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Solution

The fourth proportional to 720,545.12, 994,356.17 and 393,858.57 is: 543,526.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,545.12 : 994,356.17 = 393,858.57 : x
  2. Step 2: Convert to fraction form
    720,545.12/994,356.17 = 393,858.57/x
  3. Step 3: Cross multiply
    720,545.12x = 994,356.17 × 393,858.57
  4. Step 4: Simplify right side
    720,545.12x = 391,635,697,217.58
  5. Step 5: Solve for x
    x = 391,635,697,217.58/720,545.12
  6. Step 6: Final answer
    x = 543,526.96

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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.