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Finding the Fourth Proportional to 1,306.72, 1,959.60 and 382.04

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Solution

The fourth proportional to 1,306.72, 1,959.60 and 382.04 is: 572.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.72 : 1,959.60 = 382.04 : x
  2. Step 2: Convert to fraction form
    1,306.72/1,959.60 = 382.04/x
  3. Step 3: Cross multiply
    1,306.72x = 1,959.60 × 382.04
  4. Step 4: Simplify right side
    1,306.72x = 748,645.58
  5. Step 5: Solve for x
    x = 748,645.58/1,306.72
  6. Step 6: Final answer
    x = 572.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.