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Finding the Fourth Proportional to 154.12, 229.87 and 144.32

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Solution

The fourth proportional to 154.12, 229.87 and 144.32 is: 215.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.12 : 229.87 = 144.32 : x
  2. Step 2: Convert to fraction form
    154.12/229.87 = 144.32/x
  3. Step 3: Cross multiply
    154.12x = 229.87 × 144.32
  4. Step 4: Simplify right side
    154.12x = 33,174.84
  5. Step 5: Solve for x
    x = 33,174.84/154.12
  6. Step 6: Final answer
    x = 215.25

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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.