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Finding the Fourth Proportional to 969.96, 1,452.51 and 644.34

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Solution

The fourth proportional to 969.96, 1,452.51 and 644.34 is: 964.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.96 : 1,452.51 = 644.34 : x
  2. Step 2: Convert to fraction form
    969.96/1,452.51 = 644.34/x
  3. Step 3: Cross multiply
    969.96x = 1,452.51 × 644.34
  4. Step 4: Simplify right side
    969.96x = 935,910.29
  5. Step 5: Solve for x
    x = 935,910.29/969.96
  6. Step 6: Final answer
    x = 964.90

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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.