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Finding the Fourth Proportional to 256.91, 354.40 and 174.04

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Solution

The fourth proportional to 256.91, 354.40 and 174.04 is: 240.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.91 : 354.40 = 174.04 : x
  2. Step 2: Convert to fraction form
    256.91/354.40 = 174.04/x
  3. Step 3: Cross multiply
    256.91x = 354.40 × 174.04
  4. Step 4: Simplify right side
    256.91x = 61,679.78
  5. Step 5: Solve for x
    x = 61,679.78/256.91
  6. Step 6: Final answer
    x = 240.08

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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.