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Finding the Fourth Proportional to 296.75, 445.11 and 80.31

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Solution

The fourth proportional to 296.75, 445.11 and 80.31 is: 120.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.75 : 445.11 = 80.31 : x
  2. Step 2: Convert to fraction form
    296.75/445.11 = 80.31/x
  3. Step 3: Cross multiply
    296.75x = 445.11 × 80.31
  4. Step 4: Simplify right side
    296.75x = 35,746.78
  5. Step 5: Solve for x
    x = 35,746.78/296.75
  6. Step 6: Final answer
    x = 120.46

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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.