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Finding the Fourth Proportional to 341.69, 512.21 and 136.20

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Solution

The fourth proportional to 341.69, 512.21 and 136.20 is: 204.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.69 : 512.21 = 136.20 : x
  2. Step 2: Convert to fraction form
    341.69/512.21 = 136.20/x
  3. Step 3: Cross multiply
    341.69x = 512.21 × 136.20
  4. Step 4: Simplify right side
    341.69x = 69,761.62
  5. Step 5: Solve for x
    x = 69,761.62/341.69
  6. Step 6: Final answer
    x = 204.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.