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Finding the Fourth Proportional to 699,039.40, 964,665.17 and 393,115.69

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Solution

The fourth proportional to 699,039.40, 964,665.17 and 393,115.69 is: 542,494.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,039.40 : 964,665.17 = 393,115.69 : x
  2. Step 2: Convert to fraction form
    699,039.40/964,665.17 = 393,115.69/x
  3. Step 3: Cross multiply
    699,039.40x = 964,665.17 × 393,115.69
  4. Step 4: Simplify right side
    699,039.40x = 379,225,007,134.61
  5. Step 5: Solve for x
    x = 379,225,007,134.61/699,039.40
  6. Step 6: Final answer
    x = 542,494.47

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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.