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Finding the Fourth Proportional to 445.31, 667.97 and 292.21

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Solution

The fourth proportional to 445.31, 667.97 and 292.21 is: 438.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.31 : 667.97 = 292.21 : x
  2. Step 2: Convert to fraction form
    445.31/667.97 = 292.21/x
  3. Step 3: Cross multiply
    445.31x = 667.97 × 292.21
  4. Step 4: Simplify right side
    445.31x = 195,184.38
  5. Step 5: Solve for x
    x = 195,184.38/445.31
  6. Step 6: Final answer
    x = 438.32

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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.