Home / 420,565.12-580,372.38-239,273.15

Finding the Fourth Proportional to 420,565.12, 580,372.38 and 239,273.15

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Solution

The fourth proportional to 420,565.12, 580,372.38 and 239,273.15 is: 330,192.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,565.12 : 580,372.38 = 239,273.15 : x
  2. Step 2: Convert to fraction form
    420,565.12/580,372.38 = 239,273.15/x
  3. Step 3: Cross multiply
    420,565.12x = 580,372.38 × 239,273.15
  4. Step 4: Simplify right side
    420,565.12x = 138,867,524,633.74
  5. Step 5: Solve for x
    x = 138,867,524,633.74/420,565.12
  6. Step 6: Final answer
    x = 330,192.68

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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.