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Finding the Fourth Proportional to 151.27, 226.40 and 128.49

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Solution

The fourth proportional to 151.27, 226.40 and 128.49 is: 192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.27 : 226.40 = 128.49 : x
  2. Step 2: Convert to fraction form
    151.27/226.40 = 128.49/x
  3. Step 3: Cross multiply
    151.27x = 226.40 × 128.49
  4. Step 4: Simplify right side
    151.27x = 29,088.64
  5. Step 5: Solve for x
    x = 29,088.64/151.27
  6. Step 6: Final answer
    x = 192.30

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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.