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Finding the Fourth Proportional to 256.57, 354.09 and 146.05

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Solution

The fourth proportional to 256.57, 354.09 and 146.05 is: 201.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.57 : 354.09 = 146.05 : x
  2. Step 2: Convert to fraction form
    256.57/354.09 = 146.05/x
  3. Step 3: Cross multiply
    256.57x = 354.09 × 146.05
  4. Step 4: Simplify right side
    256.57x = 51,714.84
  5. Step 5: Solve for x
    x = 51,714.84/256.57
  6. Step 6: Final answer
    x = 201.56

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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.