Home / 420,540.28-580,358.72-239,278.30

Finding the Fourth Proportional to 420,540.28, 580,358.72 and 239,278.30

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Solution

The fourth proportional to 420,540.28, 580,358.72 and 239,278.30 is: 330,211.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,540.28 : 580,358.72 = 239,278.30 : x
  2. Step 2: Convert to fraction form
    420,540.28/580,358.72 = 239,278.30/x
  3. Step 3: Cross multiply
    420,540.28x = 580,358.72 × 239,278.30
  4. Step 4: Simplify right side
    420,540.28x = 138,867,250,323.59
  5. Step 5: Solve for x
    x = 138,867,250,323.59/420,540.28
  6. Step 6: Final answer
    x = 330,211.53

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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.