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Finding the Fourth Proportional to 254.70, 351.49 and 149.80

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Solution

The fourth proportional to 254.70, 351.49 and 149.80 is: 206.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.70 : 351.49 = 149.80 : x
  2. Step 2: Convert to fraction form
    254.70/351.49 = 149.80/x
  3. Step 3: Cross multiply
    254.70x = 351.49 × 149.80
  4. Step 4: Simplify right side
    254.70x = 52,653.20
  5. Step 5: Solve for x
    x = 52,653.20/254.70
  6. Step 6: Final answer
    x = 206.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.