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Finding the Fourth Proportional to 1,672.31, 2,512.31 and 1,179.85

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Solution

The fourth proportional to 1,672.31, 2,512.31 and 1,179.85 is: 1,772.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.31 : 2,512.31 = 1,179.85 : x
  2. Step 2: Convert to fraction form
    1,672.31/2,512.31 = 1,179.85/x
  3. Step 3: Cross multiply
    1,672.31x = 2,512.31 × 1,179.85
  4. Step 4: Simplify right side
    1,672.31x = 2,964,148.95
  5. Step 5: Solve for x
    x = 2,964,148.95/1,672.31
  6. Step 6: Final answer
    x = 1,772.49

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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.