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Finding the Fourth Proportional to 966.10, 1,333.66 and 931.47

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Solution

The fourth proportional to 966.10, 1,333.66 and 931.47 is: 1,285.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.10 : 1,333.66 = 931.47 : x
  2. Step 2: Convert to fraction form
    966.10/1,333.66 = 931.47/x
  3. Step 3: Cross multiply
    966.10x = 1,333.66 × 931.47
  4. Step 4: Simplify right side
    966.10x = 1,242,264.28
  5. Step 5: Solve for x
    x = 1,242,264.28/966.10
  6. Step 6: Final answer
    x = 1,285.85

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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.