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Finding the Fourth Proportional to 296.71, 445.06 and 91.27

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Solution

The fourth proportional to 296.71, 445.06 and 91.27 is: 136.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.71 : 445.06 = 91.27 : x
  2. Step 2: Convert to fraction form
    296.71/445.06 = 91.27/x
  3. Step 3: Cross multiply
    296.71x = 445.06 × 91.27
  4. Step 4: Simplify right side
    296.71x = 40,621.96
  5. Step 5: Solve for x
    x = 40,621.96/296.71
  6. Step 6: Final answer
    x = 136.91

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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.