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Finding the Fourth Proportional to 695.85, 966.82 and 687.12

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Solution

The fourth proportional to 695.85, 966.82 and 687.12 is: 954.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.85 : 966.82 = 687.12 : x
  2. Step 2: Convert to fraction form
    695.85/966.82 = 687.12/x
  3. Step 3: Cross multiply
    695.85x = 966.82 × 687.12
  4. Step 4: Simplify right side
    695.85x = 664,321.36
  5. Step 5: Solve for x
    x = 664,321.36/695.85
  6. Step 6: Final answer
    x = 954.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.