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Finding the Fourth Proportional to 445.67, 667.95 and 307.61

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Solution

The fourth proportional to 445.67, 667.95 and 307.61 is: 461.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.67 : 667.95 = 307.61 : x
  2. Step 2: Convert to fraction form
    445.67/667.95 = 307.61/x
  3. Step 3: Cross multiply
    445.67x = 667.95 × 307.61
  4. Step 4: Simplify right side
    445.67x = 205,469.87
  5. Step 5: Solve for x
    x = 205,469.87/445.67
  6. Step 6: Final answer
    x = 461.04

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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.