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Finding the Fourth Proportional to 254.31, 378.52 and 248.64

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Solution

The fourth proportional to 254.31, 378.52 and 248.64 is: 370.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.31 : 378.52 = 248.64 : x
  2. Step 2: Convert to fraction form
    254.31/378.52 = 248.64/x
  3. Step 3: Cross multiply
    254.31x = 378.52 × 248.64
  4. Step 4: Simplify right side
    254.31x = 94,115.21
  5. Step 5: Solve for x
    x = 94,115.21/254.31
  6. Step 6: Final answer
    x = 370.08

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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.