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Finding the Fourth Proportional to 371.11, 512.61 and 338.91

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Solution

The fourth proportional to 371.11, 512.61 and 338.91 is: 468.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.11 : 512.61 = 338.91 : x
  2. Step 2: Convert to fraction form
    371.11/512.61 = 338.91/x
  3. Step 3: Cross multiply
    371.11x = 512.61 × 338.91
  4. Step 4: Simplify right side
    371.11x = 173,728.66
  5. Step 5: Solve for x
    x = 173,728.66/371.11
  6. Step 6: Final answer
    x = 468.13

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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.