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Finding the Fourth Proportional to 248.48, 342.92 and 143.58

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Solution

The fourth proportional to 248.48, 342.92 and 143.58 is: 198.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.48 : 342.92 = 143.58 : x
  2. Step 2: Convert to fraction form
    248.48/342.92 = 143.58/x
  3. Step 3: Cross multiply
    248.48x = 342.92 × 143.58
  4. Step 4: Simplify right side
    248.48x = 49,236.45
  5. Step 5: Solve for x
    x = 49,236.45/248.48
  6. Step 6: Final answer
    x = 198.15

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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.