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Finding the Fourth Proportional to 256.97, 354.63 and 146.45

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Solution

The fourth proportional to 256.97, 354.63 and 146.45 is: 202.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.97 : 354.63 = 146.45 : x
  2. Step 2: Convert to fraction form
    256.97/354.63 = 146.45/x
  3. Step 3: Cross multiply
    256.97x = 354.63 × 146.45
  4. Step 4: Simplify right side
    256.97x = 51,935.56
  5. Step 5: Solve for x
    x = 51,935.56/256.97
  6. Step 6: Final answer
    x = 202.11

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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.