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Finding the Fourth Proportional to 341.78, 512.76 and 136.31

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Solution

The fourth proportional to 341.78, 512.76 and 136.31 is: 204.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.78 : 512.76 = 136.31 : x
  2. Step 2: Convert to fraction form
    341.78/512.76 = 136.31/x
  3. Step 3: Cross multiply
    341.78x = 512.76 × 136.31
  4. Step 4: Simplify right side
    341.78x = 69,894.32
  5. Step 5: Solve for x
    x = 69,894.32/341.78
  6. Step 6: Final answer
    x = 204.50

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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.