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Finding the Fourth Proportional to 149.21, 222.55 and 144.65

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Solution

The fourth proportional to 149.21, 222.55 and 144.65 is: 215.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.21 : 222.55 = 144.65 : x
  2. Step 2: Convert to fraction form
    149.21/222.55 = 144.65/x
  3. Step 3: Cross multiply
    149.21x = 222.55 × 144.65
  4. Step 4: Simplify right side
    149.21x = 32,191.86
  5. Step 5: Solve for x
    x = 32,191.86/149.21
  6. Step 6: Final answer
    x = 215.76

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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.