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Finding the Fourth Proportional to 151.05, 226.88 and 90.30

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Solution

The fourth proportional to 151.05, 226.88 and 90.30 is: 135.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.05 : 226.88 = 90.30 : x
  2. Step 2: Convert to fraction form
    151.05/226.88 = 90.30/x
  3. Step 3: Cross multiply
    151.05x = 226.88 × 90.30
  4. Step 4: Simplify right side
    151.05x = 20,487.26
  5. Step 5: Solve for x
    x = 20,487.26/151.05
  6. Step 6: Final answer
    x = 135.63

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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.