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Finding the Fourth Proportional to 296.95, 445.42 and 80.53

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Solution

The fourth proportional to 296.95, 445.42 and 80.53 is: 120.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.95 : 445.42 = 80.53 : x
  2. Step 2: Convert to fraction form
    296.95/445.42 = 80.53/x
  3. Step 3: Cross multiply
    296.95x = 445.42 × 80.53
  4. Step 4: Simplify right side
    296.95x = 35,869.67
  5. Step 5: Solve for x
    x = 35,869.67/296.95
  6. Step 6: Final answer
    x = 120.79

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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.