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Finding the Fourth Proportional to 248.10, 342.38 and 149.86

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Solution

The fourth proportional to 248.10, 342.38 and 149.86 is: 206.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.10 : 342.38 = 149.86 : x
  2. Step 2: Convert to fraction form
    248.10/342.38 = 149.86/x
  3. Step 3: Cross multiply
    248.10x = 342.38 × 149.86
  4. Step 4: Simplify right side
    248.10x = 51,309.07
  5. Step 5: Solve for x
    x = 51,309.07/248.10
  6. Step 6: Final answer
    x = 206.81

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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.