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Finding the Fourth Proportional to 254.16, 379.38 and 218.32

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Solution

The fourth proportional to 254.16, 379.38 and 218.32 is: 325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.16 : 379.38 = 218.32 : x
  2. Step 2: Convert to fraction form
    254.16/379.38 = 218.32/x
  3. Step 3: Cross multiply
    254.16x = 379.38 × 218.32
  4. Step 4: Simplify right side
    254.16x = 82,826.24
  5. Step 5: Solve for x
    x = 82,826.24/254.16
  6. Step 6: Final answer
    x = 325.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.