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Finding the Fourth Proportional to 966.24, 1,332.78 and 671.66

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Solution

The fourth proportional to 966.24, 1,332.78 and 671.66 is: 926.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.24 : 1,332.78 = 671.66 : x
  2. Step 2: Convert to fraction form
    966.24/1,332.78 = 671.66/x
  3. Step 3: Cross multiply
    966.24x = 1,332.78 × 671.66
  4. Step 4: Simplify right side
    966.24x = 895,175.01
  5. Step 5: Solve for x
    x = 895,175.01/966.24
  6. Step 6: Final answer
    x = 926.45

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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.