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Finding the Fourth Proportional to 256.41, 353.09 and 248.51

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Solution

The fourth proportional to 256.41, 353.09 and 248.51 is: 342.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.41 : 353.09 = 248.51 : x
  2. Step 2: Convert to fraction form
    256.41/353.09 = 248.51/x
  3. Step 3: Cross multiply
    256.41x = 353.09 × 248.51
  4. Step 4: Simplify right side
    256.41x = 87,747.90
  5. Step 5: Solve for x
    x = 87,747.90/256.41
  6. Step 6: Final answer
    x = 342.22

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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.