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Finding the Fourth Proportional to 329.06, 493.60 and 136.70

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Solution

The fourth proportional to 329.06, 493.60 and 136.70 is: 205.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.06 : 493.60 = 136.70 : x
  2. Step 2: Convert to fraction form
    329.06/493.60 = 136.70/x
  3. Step 3: Cross multiply
    329.06x = 493.60 × 136.70
  4. Step 4: Simplify right side
    329.06x = 67,475.12
  5. Step 5: Solve for x
    x = 67,475.12/329.06
  6. Step 6: Final answer
    x = 205.05

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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.