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Finding the Fourth Proportional to 644.81, 966.23 and 352.15

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Solution

The fourth proportional to 644.81, 966.23 and 352.15 is: 527.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.81 : 966.23 = 352.15 : x
  2. Step 2: Convert to fraction form
    644.81/966.23 = 352.15/x
  3. Step 3: Cross multiply
    644.81x = 966.23 × 352.15
  4. Step 4: Simplify right side
    644.81x = 340,255.04
  5. Step 5: Solve for x
    x = 340,255.04/644.81
  6. Step 6: Final answer
    x = 527.68

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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.