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Finding the Fourth Proportional to 420,446.60, 580,229.84 and 239,153.87

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Solution

The fourth proportional to 420,446.60, 580,229.84 and 239,153.87 is: 330,040.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,446.60 : 580,229.84 = 239,153.87 : x
  2. Step 2: Convert to fraction form
    420,446.60/580,229.84 = 239,153.87/x
  3. Step 3: Cross multiply
    420,446.60x = 580,229.84 × 239,153.87
  4. Step 4: Simplify right side
    420,446.60x = 138,764,211,725.48
  5. Step 5: Solve for x
    x = 138,764,211,725.48/420,446.60
  6. Step 6: Final answer
    x = 330,040.04

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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.