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Finding the Fourth Proportional to 219,711.60, 329,956.20 and 169,912.80

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Solution

The fourth proportional to 219,711.60, 329,956.20 and 169,912.80 is: 255,169.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,711.60 : 329,956.20 = 169,912.80 : x
  2. Step 2: Convert to fraction form
    219,711.60/329,956.20 = 169,912.80/x
  3. Step 3: Cross multiply
    219,711.60x = 329,956.20 × 169,912.80
  4. Step 4: Simplify right side
    219,711.60x = 56,063,781,819.36
  5. Step 5: Solve for x
    x = 56,063,781,819.36/219,711.60
  6. Step 6: Final answer
    x = 255,169.88

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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.