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Finding the Fourth Proportional to 966.61, 1,333.33 and 854.22

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Solution

The fourth proportional to 966.61, 1,333.33 and 854.22 is: 1,178.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.61 : 1,333.33 = 854.22 : x
  2. Step 2: Convert to fraction form
    966.61/1,333.33 = 854.22/x
  3. Step 3: Cross multiply
    966.61x = 1,333.33 × 854.22
  4. Step 4: Simplify right side
    966.61x = 1,138,951.68
  5. Step 5: Solve for x
    x = 1,138,951.68/966.61
  6. Step 6: Final answer
    x = 1,178.29

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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.