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Finding the Fourth Proportional to 1,251.72, 1,876.14 and 942.57

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Solution

The fourth proportional to 1,251.72, 1,876.14 and 942.57 is: 1,412.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.72 : 1,876.14 = 942.57 : x
  2. Step 2: Convert to fraction form
    1,251.72/1,876.14 = 942.57/x
  3. Step 3: Cross multiply
    1,251.72x = 1,876.14 × 942.57
  4. Step 4: Simplify right side
    1,251.72x = 1,768,393.28
  5. Step 5: Solve for x
    x = 1,768,393.28/1,251.72
  6. Step 6: Final answer
    x = 1,412.77

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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.