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Finding the Fourth Proportional to 342.32, 513.40 and 136.83

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Solution

The fourth proportional to 342.32, 513.40 and 136.83 is: 205.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.32 : 513.40 = 136.83 : x
  2. Step 2: Convert to fraction form
    342.32/513.40 = 136.83/x
  3. Step 3: Cross multiply
    342.32x = 513.40 × 136.83
  4. Step 4: Simplify right side
    342.32x = 70,248.52
  5. Step 5: Solve for x
    x = 70,248.52/342.32
  6. Step 6: Final answer
    x = 205.21

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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.