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Finding the Fourth Proportional to 695.73, 1,043.82 and 387.18

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Solution

The fourth proportional to 695.73, 1,043.82 and 387.18 is: 580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.73 : 1,043.82 = 387.18 : x
  2. Step 2: Convert to fraction form
    695.73/1,043.82 = 387.18/x
  3. Step 3: Cross multiply
    695.73x = 1,043.82 × 387.18
  4. Step 4: Simplify right side
    695.73x = 404,146.23
  5. Step 5: Solve for x
    x = 404,146.23/695.73
  6. Step 6: Final answer
    x = 580.90

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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.