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Finding the Fourth Proportional to 256.66, 354.18 and 204.10

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Solution

The fourth proportional to 256.66, 354.18 and 204.10 is: 281.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.66 : 354.18 = 204.10 : x
  2. Step 2: Convert to fraction form
    256.66/354.18 = 204.10/x
  3. Step 3: Cross multiply
    256.66x = 354.18 × 204.10
  4. Step 4: Simplify right side
    256.66x = 72,288.14
  5. Step 5: Solve for x
    x = 72,288.14/256.66
  6. Step 6: Final answer
    x = 281.65

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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.