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Finding the Fourth Proportional to 695.15, 959.15 and 474.56

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Solution

The fourth proportional to 695.15, 959.15 and 474.56 is: 654.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.15 : 959.15 = 474.56 : x
  2. Step 2: Convert to fraction form
    695.15/959.15 = 474.56/x
  3. Step 3: Cross multiply
    695.15x = 959.15 × 474.56
  4. Step 4: Simplify right side
    695.15x = 455,171.85
  5. Step 5: Solve for x
    x = 455,171.85/695.15
  6. Step 6: Final answer
    x = 654.78

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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.