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Finding the Fourth Proportional to 371.58, 512.91 and 247.20

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Solution

The fourth proportional to 371.58, 512.91 and 247.20 is: 341.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.58 : 512.91 = 247.20 : x
  2. Step 2: Convert to fraction form
    371.58/512.91 = 247.20/x
  3. Step 3: Cross multiply
    371.58x = 512.91 × 247.20
  4. Step 4: Simplify right side
    371.58x = 126,791.35
  5. Step 5: Solve for x
    x = 126,791.35/371.58
  6. Step 6: Final answer
    x = 341.22

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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.