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Finding the Fourth Proportional to 1,877.72, 2,591.64 and 1,248.28

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Solution

The fourth proportional to 1,877.72, 2,591.64 and 1,248.28 is: 1,722.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.72 : 2,591.64 = 1,248.28 : x
  2. Step 2: Convert to fraction form
    1,877.72/2,591.64 = 1,248.28/x
  3. Step 3: Cross multiply
    1,877.72x = 2,591.64 × 1,248.28
  4. Step 4: Simplify right side
    1,877.72x = 3,235,092.38
  5. Step 5: Solve for x
    x = 3,235,092.38/1,877.72
  6. Step 6: Final answer
    x = 1,722.88

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1.5x scale

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.