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Finding the Fourth Proportional to 642.92, 964.22 and 252.90

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Solution

The fourth proportional to 642.92, 964.22 and 252.90 is: 379.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.92 : 964.22 = 252.90 : x
  2. Step 2: Convert to fraction form
    642.92/964.22 = 252.90/x
  3. Step 3: Cross multiply
    642.92x = 964.22 × 252.90
  4. Step 4: Simplify right side
    642.92x = 243,849.97
  5. Step 5: Solve for x
    x = 243,849.97/642.92
  6. Step 6: Final answer
    x = 379.29

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1.5x scale

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.