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Finding the Fourth Proportional to 247.80, 342.02 and 149.62

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Solution

The fourth proportional to 247.80, 342.02 and 149.62 is: 206.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.80 : 342.02 = 149.62 : x
  2. Step 2: Convert to fraction form
    247.80/342.02 = 149.62/x
  3. Step 3: Cross multiply
    247.80x = 342.02 × 149.62
  4. Step 4: Simplify right side
    247.80x = 51,173.03
  5. Step 5: Solve for x
    x = 51,173.03/247.80
  6. Step 6: Final answer
    x = 206.51

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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.