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Finding the Fourth Proportional to 420,540.48, 580,294.80 and 239,275.44

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Solution

The fourth proportional to 420,540.48, 580,294.80 and 239,275.44 is: 330,171.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,540.48 : 580,294.80 = 239,275.44 : x
  2. Step 2: Convert to fraction form
    420,540.48/580,294.80 = 239,275.44/x
  3. Step 3: Cross multiply
    420,540.48x = 580,294.80 × 239,275.44
  4. Step 4: Simplify right side
    420,540.48x = 138,850,293,599.71
  5. Step 5: Solve for x
    x = 138,850,293,599.71/420,540.48
  6. Step 6: Final answer
    x = 330,171.05

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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.