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Finding the Fourth Proportional to 373.25, 515.11 and 215.91

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Solution

The fourth proportional to 373.25, 515.11 and 215.91 is: 297.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.25 : 515.11 = 215.91 : x
  2. Step 2: Convert to fraction form
    373.25/515.11 = 215.91/x
  3. Step 3: Cross multiply
    373.25x = 515.11 × 215.91
  4. Step 4: Simplify right side
    373.25x = 111,217.40
  5. Step 5: Solve for x
    x = 111,217.40/373.25
  6. Step 6: Final answer
    x = 297.97

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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.