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Finding the Fourth Proportional to 1,672.32, 2,508.56 and 746.88

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Solution

The fourth proportional to 1,672.32, 2,508.56 and 746.88 is: 1,120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.32 : 2,508.56 = 746.88 : x
  2. Step 2: Convert to fraction form
    1,672.32/2,508.56 = 746.88/x
  3. Step 3: Cross multiply
    1,672.32x = 2,508.56 × 746.88
  4. Step 4: Simplify right side
    1,672.32x = 1,873,593.29
  5. Step 5: Solve for x
    x = 1,873,593.29/1,672.32
  6. Step 6: Final answer
    x = 1,120.36

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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.