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Finding the Fourth Proportional to 151.68, 226.20 and 143.16

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Solution

The fourth proportional to 151.68, 226.20 and 143.16 is: 213.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.68 : 226.20 = 143.16 : x
  2. Step 2: Convert to fraction form
    151.68/226.20 = 143.16/x
  3. Step 3: Cross multiply
    151.68x = 226.20 × 143.16
  4. Step 4: Simplify right side
    151.68x = 32,382.79
  5. Step 5: Solve for x
    x = 32,382.79/151.68
  6. Step 6: Final answer
    x = 213.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.