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Finding the Fourth Proportional to 695.60, 1,042.08 and 672.44

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Solution

The fourth proportional to 695.60, 1,042.08 and 672.44 is: 1,007.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.60 : 1,042.08 = 672.44 : x
  2. Step 2: Convert to fraction form
    695.60/1,042.08 = 672.44/x
  3. Step 3: Cross multiply
    695.60x = 1,042.08 × 672.44
  4. Step 4: Simplify right side
    695.60x = 700,736.28
  5. Step 5: Solve for x
    x = 700,736.28/695.60
  6. Step 6: Final answer
    x = 1,007.38

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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.