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Finding the Fourth Proportional to 966.91, 1,333.42 and 703.09

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Solution

The fourth proportional to 966.91, 1,333.42 and 703.09 is: 969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.91 : 1,333.42 = 703.09 : x
  2. Step 2: Convert to fraction form
    966.91/1,333.42 = 703.09/x
  3. Step 3: Cross multiply
    966.91x = 1,333.42 × 703.09
  4. Step 4: Simplify right side
    966.91x = 937,514.27
  5. Step 5: Solve for x
    x = 937,514.27/966.91
  6. Step 6: Final answer
    x = 969.60

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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.