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Finding the Fourth Proportional to 149.29, 222.35 and 142.62

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Solution

The fourth proportional to 149.29, 222.35 and 142.62 is: 212.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.29 : 222.35 = 142.62 : x
  2. Step 2: Convert to fraction form
    149.29/222.35 = 142.62/x
  3. Step 3: Cross multiply
    149.29x = 222.35 × 142.62
  4. Step 4: Simplify right side
    149.29x = 31,712.65
  5. Step 5: Solve for x
    x = 31,712.65/149.29
  6. Step 6: Final answer
    x = 212.43

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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.