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Finding the Fourth Proportional to 256.31, 353.73 and 158.07

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Solution

The fourth proportional to 256.31, 353.73 and 158.07 is: 218.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.31 : 353.73 = 158.07 : x
  2. Step 2: Convert to fraction form
    256.31/353.73 = 158.07/x
  3. Step 3: Cross multiply
    256.31x = 353.73 × 158.07
  4. Step 4: Simplify right side
    256.31x = 55,913.31
  5. Step 5: Solve for x
    x = 55,913.31/256.31
  6. Step 6: Final answer
    x = 218.15

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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.