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Finding the Fourth Proportional to 372.91, 514.60 and 215.53

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Solution

The fourth proportional to 372.91, 514.60 and 215.53 is: 297.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.91 : 514.60 = 215.53 : x
  2. Step 2: Convert to fraction form
    372.91/514.60 = 215.53/x
  3. Step 3: Cross multiply
    372.91x = 514.60 × 215.53
  4. Step 4: Simplify right side
    372.91x = 110,910.15
  5. Step 5: Solve for x
    x = 110,910.15/372.91
  6. Step 6: Final answer
    x = 297.42

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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.