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Finding the Fourth Proportional to 248.16, 372.14 and 103.78

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Solution

The fourth proportional to 248.16, 372.14 and 103.78 is: 155.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.16 : 372.14 = 103.78 : x
  2. Step 2: Convert to fraction form
    248.16/372.14 = 103.78/x
  3. Step 3: Cross multiply
    248.16x = 372.14 × 103.78
  4. Step 4: Simplify right side
    248.16x = 38,621.61
  5. Step 5: Solve for x
    x = 38,621.61/248.16
  6. Step 6: Final answer
    x = 155.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.