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Finding the Fourth Proportional to 247.68, 371.60 and 103.36

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Solution

The fourth proportional to 247.68, 371.60 and 103.36 is: 155.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.68 : 371.60 = 103.36 : x
  2. Step 2: Convert to fraction form
    247.68/371.60 = 103.36/x
  3. Step 3: Cross multiply
    247.68x = 371.60 × 103.36
  4. Step 4: Simplify right side
    247.68x = 38,408.58
  5. Step 5: Solve for x
    x = 38,408.58/247.68
  6. Step 6: Final answer
    x = 155.07

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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.