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Finding the Fourth Proportional to 410,212.29, 615,315.63 and 220,761.78

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Solution

The fourth proportional to 410,212.29, 615,315.63 and 220,761.78 is: 331,141.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,212.29 : 615,315.63 = 220,761.78 : x
  2. Step 2: Convert to fraction form
    410,212.29/615,315.63 = 220,761.78/x
  3. Step 3: Cross multiply
    410,212.29x = 615,315.63 × 220,761.78
  4. Step 4: Simplify right side
    410,212.29x = 135,838,173,740.62
  5. Step 5: Solve for x
    x = 135,838,173,740.62/410,212.29
  6. Step 6: Final answer
    x = 331,141.16

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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.