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Finding the Fourth Proportional to 645.33, 966.15 and 636.21

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Solution

The fourth proportional to 645.33, 966.15 and 636.21 is: 952.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.33 : 966.15 = 636.21 : x
  2. Step 2: Convert to fraction form
    645.33/966.15 = 636.21/x
  3. Step 3: Cross multiply
    645.33x = 966.15 × 636.21
  4. Step 4: Simplify right side
    645.33x = 614,674.29
  5. Step 5: Solve for x
    x = 614,674.29/645.33
  6. Step 6: Final answer
    x = 952.50

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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.