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Finding the Fourth Proportional to 371.22, 556 and 248.90

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Solution

The fourth proportional to 371.22, 556 and 248.90 is: 372.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.22 : 556 = 248.90 : x
  2. Step 2: Convert to fraction form
    371.22/556 = 248.90/x
  3. Step 3: Cross multiply
    371.22x = 556 × 248.90
  4. Step 4: Simplify right side
    371.22x = 138,388.40
  5. Step 5: Solve for x
    x = 138,388.40/371.22
  6. Step 6: Final answer
    x = 372.79

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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.