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Finding the Fourth Proportional to 420,367.02, 580,123.92 and 239,110.86

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Solution

The fourth proportional to 420,367.02, 580,123.92 and 239,110.86 is: 329,982.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,367.02 : 580,123.92 = 239,110.86 : x
  2. Step 2: Convert to fraction form
    420,367.02/580,123.92 = 239,110.86/x
  3. Step 3: Cross multiply
    420,367.02x = 580,123.92 × 239,110.86
  4. Step 4: Simplify right side
    420,367.02x = 138,713,929,417.77
  5. Step 5: Solve for x
    x = 138,713,929,417.77/420,367.02
  6. Step 6: Final answer
    x = 329,982.90

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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.