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Finding the Fourth Proportional to 1,781.38, 2,671.87 and 482.95

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Solution

The fourth proportional to 1,781.38, 2,671.87 and 482.95 is: 724.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.38 : 2,671.87 = 482.95 : x
  2. Step 2: Convert to fraction form
    1,781.38/2,671.87 = 482.95/x
  3. Step 3: Cross multiply
    1,781.38x = 2,671.87 × 482.95
  4. Step 4: Simplify right side
    1,781.38x = 1,290,379.62
  5. Step 5: Solve for x
    x = 1,290,379.62/1,781.38
  6. Step 6: Final answer
    x = 724.37

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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.