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Finding the Fourth Proportional to 1,414.92, 1,951.85 and 855.08

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Solution

The fourth proportional to 1,414.92, 1,951.85 and 855.08 is: 1,179.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.92 : 1,951.85 = 855.08 : x
  2. Step 2: Convert to fraction form
    1,414.92/1,951.85 = 855.08/x
  3. Step 3: Cross multiply
    1,414.92x = 1,951.85 × 855.08
  4. Step 4: Simplify right side
    1,414.92x = 1,668,978.14
  5. Step 5: Solve for x
    x = 1,668,978.14/1,414.92
  6. Step 6: Final answer
    x = 1,179.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.