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Finding the Fourth Proportional to 256.77, 354.24 and 146.21

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Solution

The fourth proportional to 256.77, 354.24 and 146.21 is: 201.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.77 : 354.24 = 146.21 : x
  2. Step 2: Convert to fraction form
    256.77/354.24 = 146.21/x
  3. Step 3: Cross multiply
    256.77x = 354.24 × 146.21
  4. Step 4: Simplify right side
    256.77x = 51,791.66
  5. Step 5: Solve for x
    x = 51,791.66/256.77
  6. Step 6: Final answer
    x = 201.70

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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.