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Finding the Fourth Proportional to 695.81, 1,042.88 and 284.73

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Solution

The fourth proportional to 695.81, 1,042.88 and 284.73 is: 426.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.81 : 1,042.88 = 284.73 : x
  2. Step 2: Convert to fraction form
    695.81/1,042.88 = 284.73/x
  3. Step 3: Cross multiply
    695.81x = 1,042.88 × 284.73
  4. Step 4: Simplify right side
    695.81x = 296,937.80
  5. Step 5: Solve for x
    x = 296,937.80/695.81
  6. Step 6: Final answer
    x = 426.75

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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.