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Finding the Fourth Proportional to 151.86, 226.70 and 145.22

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Solution

The fourth proportional to 151.86, 226.70 and 145.22 is: 216.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.86 : 226.70 = 145.22 : x
  2. Step 2: Convert to fraction form
    151.86/226.70 = 145.22/x
  3. Step 3: Cross multiply
    151.86x = 226.70 × 145.22
  4. Step 4: Simplify right side
    151.86x = 32,920.60
  5. Step 5: Solve for x
    x = 32,920.60/151.86
  6. Step 6: Final answer
    x = 216.78

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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.