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Finding the Fourth Proportional to 968.14, 1,452.21 and 644.14

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Solution

The fourth proportional to 968.14, 1,452.21 and 644.14 is: 966.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.14 : 1,452.21 = 644.14 : x
  2. Step 2: Convert to fraction form
    968.14/1,452.21 = 644.14/x
  3. Step 3: Cross multiply
    968.14x = 1,452.21 × 644.14
  4. Step 4: Simplify right side
    968.14x = 935,426.55
  5. Step 5: Solve for x
    x = 935,426.55/968.14
  6. Step 6: Final answer
    x = 966.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.