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Finding the Fourth Proportional to 420,333.90, 580,073.58 and 239,071.92

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Solution

The fourth proportional to 420,333.90, 580,073.58 and 239,071.92 is: 329,926.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,333.90 : 580,073.58 = 239,071.92 : x
  2. Step 2: Convert to fraction form
    420,333.90/580,073.58 = 239,071.92/x
  3. Step 3: Cross multiply
    420,333.90x = 580,073.58 × 239,071.92
  4. Step 4: Simplify right side
    420,333.90x = 138,679,304,511.87
  5. Step 5: Solve for x
    x = 138,679,304,511.87/420,333.90
  6. Step 6: Final answer
    x = 329,926.53

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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.