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Finding the Fourth Proportional to 371.12, 512.08 and 215.92

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Solution

The fourth proportional to 371.12, 512.08 and 215.92 is: 297.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.12 : 512.08 = 215.92 : x
  2. Step 2: Convert to fraction form
    371.12/512.08 = 215.92/x
  3. Step 3: Cross multiply
    371.12x = 512.08 × 215.92
  4. Step 4: Simplify right side
    371.12x = 110,568.31
  5. Step 5: Solve for x
    x = 110,568.31/371.12
  6. Step 6: Final answer
    x = 297.93

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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.