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Finding the Fourth Proportional to 328,481.20, 492,721.80 and 275,337.10

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Solution

The fourth proportional to 328,481.20, 492,721.80 and 275,337.10 is: 413,005.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,481.20 : 492,721.80 = 275,337.10 : x
  2. Step 2: Convert to fraction form
    328,481.20/492,721.80 = 275,337.10/x
  3. Step 3: Cross multiply
    328,481.20x = 492,721.80 × 275,337.10
  4. Step 4: Simplify right side
    328,481.20x = 135,664,591,518.78
  5. Step 5: Solve for x
    x = 135,664,591,518.78/328,481.20
  6. Step 6: Final answer
    x = 413,005.65

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Similar ratio
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1.5x scale

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.