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Finding the Fourth Proportional to 966.44, 1,334.79 and 636.34

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Solution

The fourth proportional to 966.44, 1,334.79 and 636.34 is: 878.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.44 : 1,334.79 = 636.34 : x
  2. Step 2: Convert to fraction form
    966.44/1,334.79 = 636.34/x
  3. Step 3: Cross multiply
    966.44x = 1,334.79 × 636.34
  4. Step 4: Simplify right side
    966.44x = 849,370.41
  5. Step 5: Solve for x
    x = 849,370.41/966.44
  6. Step 6: Final answer
    x = 878.87

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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.