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Finding the Fourth Proportional to 420,351.89, 580,098.33 and 239,089.86

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Solution

The fourth proportional to 420,351.89, 580,098.33 and 239,089.86 is: 329,951.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,351.89 : 580,098.33 = 239,089.86 : x
  2. Step 2: Convert to fraction form
    420,351.89/580,098.33 = 239,089.86/x
  3. Step 3: Cross multiply
    420,351.89x = 580,098.33 × 239,089.86
  4. Step 4: Simplify right side
    420,351.89x = 138,695,628,505.93
  5. Step 5: Solve for x
    x = 138,695,628,505.93/420,351.89
  6. Step 6: Final answer
    x = 329,951.25

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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.