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Finding the Fourth Proportional to 708,801.08, 978,123.66 and 386,517.20

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Solution

The fourth proportional to 708,801.08, 978,123.66 and 386,517.20 is: 533,381.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,801.08 : 978,123.66 = 386,517.20 : x
  2. Step 2: Convert to fraction form
    708,801.08/978,123.66 = 386,517.20/x
  3. Step 3: Cross multiply
    708,801.08x = 978,123.66 × 386,517.20
  4. Step 4: Simplify right side
    708,801.08x = 378,061,618,316.95
  5. Step 5: Solve for x
    x = 378,061,618,316.95/708,801.08
  6. Step 6: Final answer
    x = 533,381.83

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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.