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Finding the Fourth Proportional to 1,254.03, 1,877.10 and 861.73

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Solution

The fourth proportional to 1,254.03, 1,877.10 and 861.73 is: 1,289.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.03 : 1,877.10 = 861.73 : x
  2. Step 2: Convert to fraction form
    1,254.03/1,877.10 = 861.73/x
  3. Step 3: Cross multiply
    1,254.03x = 1,877.10 × 861.73
  4. Step 4: Simplify right side
    1,254.03x = 1,617,553.38
  5. Step 5: Solve for x
    x = 1,617,553.38/1,254.03
  6. Step 6: Final answer
    x = 1,289.88

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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.