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Finding the Fourth Proportional to 1,251.56, 1,877.42 and 418.59

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Solution

The fourth proportional to 1,251.56, 1,877.42 and 418.59 is: 627.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.56 : 1,877.42 = 418.59 : x
  2. Step 2: Convert to fraction form
    1,251.56/1,877.42 = 418.59/x
  3. Step 3: Cross multiply
    1,251.56x = 1,877.42 × 418.59
  4. Step 4: Simplify right side
    1,251.56x = 785,870.28
  5. Step 5: Solve for x
    x = 785,870.28/1,251.56
  6. Step 6: Final answer
    x = 627.91

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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.