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Finding the Fourth Proportional to 696.32, 961.28 and 475.68

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Solution

The fourth proportional to 696.32, 961.28 and 475.68 is: 656.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.32 : 961.28 = 475.68 : x
  2. Step 2: Convert to fraction form
    696.32/961.28 = 475.68/x
  3. Step 3: Cross multiply
    696.32x = 961.28 × 475.68
  4. Step 4: Simplify right side
    696.32x = 457,261.67
  5. Step 5: Solve for x
    x = 457,261.67/696.32
  6. Step 6: Final answer
    x = 656.68

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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.