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Finding the Fourth Proportional to 151.16, 226.91 and 120.40

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Solution

The fourth proportional to 151.16, 226.91 and 120.40 is: 180.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.16 : 226.91 = 120.40 : x
  2. Step 2: Convert to fraction form
    151.16/226.91 = 120.40/x
  3. Step 3: Cross multiply
    151.16x = 226.91 × 120.40
  4. Step 4: Simplify right side
    151.16x = 27,319.70
  5. Step 5: Solve for x
    x = 27,319.70/151.16
  6. Step 6: Final answer
    x = 180.74

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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.