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Finding the Fourth Proportional to 342.08, 512.91 and 136.41

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Solution

The fourth proportional to 342.08, 512.91 and 136.41 is: 204.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.08 : 512.91 = 136.41 : x
  2. Step 2: Convert to fraction form
    342.08/512.91 = 136.41/x
  3. Step 3: Cross multiply
    342.08x = 512.91 × 136.41
  4. Step 4: Simplify right side
    342.08x = 69,966.05
  5. Step 5: Solve for x
    x = 69,966.05/342.08
  6. Step 6: Final answer
    x = 204.53

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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.