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Finding the Fourth Proportional to 695.31, 959.80 and 474.38

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Solution

The fourth proportional to 695.31, 959.80 and 474.38 is: 654.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.31 : 959.80 = 474.38 : x
  2. Step 2: Convert to fraction form
    695.31/959.80 = 474.38/x
  3. Step 3: Cross multiply
    695.31x = 959.80 × 474.38
  4. Step 4: Simplify right side
    695.31x = 455,311.13
  5. Step 5: Solve for x
    x = 455,311.13/695.31
  6. Step 6: Final answer
    x = 654.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.