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Finding the Fourth Proportional to 420,350.76, 580,096.80 and 239,088.78

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Solution

The fourth proportional to 420,350.76, 580,096.80 and 239,088.78 is: 329,949.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,350.76 : 580,096.80 = 239,088.78 : x
  2. Step 2: Convert to fraction form
    420,350.76/580,096.80 = 239,088.78/x
  3. Step 3: Cross multiply
    420,350.76x = 580,096.80 × 239,088.78
  4. Step 4: Simplify right side
    420,350.76x = 138,694,636,193.90
  5. Step 5: Solve for x
    x = 138,694,636,193.90/420,350.76
  6. Step 6: Final answer
    x = 329,949.77

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.