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Finding the Fourth Proportional to 386,672.74, 580,008.08 and 218,116.55

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Solution

The fourth proportional to 386,672.74, 580,008.08 and 218,116.55 is: 327,174.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,672.74 : 580,008.08 = 218,116.55 : x
  2. Step 2: Convert to fraction form
    386,672.74/580,008.08 = 218,116.55/x
  3. Step 3: Cross multiply
    386,672.74x = 580,008.08 × 218,116.55
  4. Step 4: Simplify right side
    386,672.74x = 126,509,363,377.04
  5. Step 5: Solve for x
    x = 126,509,363,377.04/386,672.74
  6. Step 6: Final answer
    x = 327,174.25

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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.