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Finding the Fourth Proportional to 256.06, 353.39 and 145.54

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Solution

The fourth proportional to 256.06, 353.39 and 145.54 is: 200.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.06 : 353.39 = 145.54 : x
  2. Step 2: Convert to fraction form
    256.06/353.39 = 145.54/x
  3. Step 3: Cross multiply
    256.06x = 353.39 × 145.54
  4. Step 4: Simplify right side
    256.06x = 51,432.38
  5. Step 5: Solve for x
    x = 51,432.38/256.06
  6. Step 6: Final answer
    x = 200.86

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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.