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Finding the Fourth Proportional to 308.36, 425.57 and 177.40

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Solution

The fourth proportional to 308.36, 425.57 and 177.40 is: 244.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.36 : 425.57 = 177.40 : x
  2. Step 2: Convert to fraction form
    308.36/425.57 = 177.40/x
  3. Step 3: Cross multiply
    308.36x = 425.57 × 177.40
  4. Step 4: Simplify right side
    308.36x = 75,493.10
  5. Step 5: Solve for x
    x = 75,493.10/308.36
  6. Step 6: Final answer
    x = 244.82

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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.