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Finding the Fourth Proportional to 248.02, 372.06 and 103.78

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Solution

The fourth proportional to 248.02, 372.06 and 103.78 is: 155.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.02 : 372.06 = 103.78 : x
  2. Step 2: Convert to fraction form
    248.02/372.06 = 103.78/x
  3. Step 3: Cross multiply
    248.02x = 372.06 × 103.78
  4. Step 4: Simplify right side
    248.02x = 38,612.39
  5. Step 5: Solve for x
    x = 38,612.39/248.02
  6. Step 6: Final answer
    x = 155.68

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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.