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Finding the Fourth Proportional to 386,840.66, 580,426.11 and 218,487.38

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Solution

The fourth proportional to 386,840.66, 580,426.11 and 218,487.38 is: 327,824.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,840.66 : 580,426.11 = 218,487.38 : x
  2. Step 2: Convert to fraction form
    386,840.66/580,426.11 = 218,487.38/x
  3. Step 3: Cross multiply
    386,840.66x = 580,426.11 × 218,487.38
  4. Step 4: Simplify right side
    386,840.66x = 126,815,780,057.49
  5. Step 5: Solve for x
    x = 126,815,780,057.49/386,840.66
  6. Step 6: Final answer
    x = 327,824.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.