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Finding the Fourth Proportional to 248.17, 342.27 and 149.91

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Solution

The fourth proportional to 248.17, 342.27 and 149.91 is: 206.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.17 : 342.27 = 149.91 : x
  2. Step 2: Convert to fraction form
    248.17/342.27 = 149.91/x
  3. Step 3: Cross multiply
    248.17x = 342.27 × 149.91
  4. Step 4: Simplify right side
    248.17x = 51,309.70
  5. Step 5: Solve for x
    x = 51,309.70/248.17
  6. Step 6: Final answer
    x = 206.75

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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.