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Finding the Fourth Proportional to 386,770.87, 580,155.51 and 218,214.68

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Solution

The fourth proportional to 386,770.87, 580,155.51 and 218,214.68 is: 327,321.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,770.87 : 580,155.51 = 218,214.68 : x
  2. Step 2: Convert to fraction form
    386,770.87/580,155.51 = 218,214.68/x
  3. Step 3: Cross multiply
    386,770.87x = 580,155.51 × 218,214.68
  4. Step 4: Simplify right side
    386,770.87x = 126,598,451,777.48
  5. Step 5: Solve for x
    x = 126,598,451,777.48/386,770.87
  6. Step 6: Final answer
    x = 327,321.58

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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.