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Finding the Fourth Proportional to 323,760.80, 485,641.20 and 102,144.80

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Solution

The fourth proportional to 323,760.80, 485,641.20 and 102,144.80 is: 153,217.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,760.80 : 485,641.20 = 102,144.80 : x
  2. Step 2: Convert to fraction form
    323,760.80/485,641.20 = 102,144.80/x
  3. Step 3: Cross multiply
    323,760.80x = 485,641.20 × 102,144.80
  4. Step 4: Simplify right side
    323,760.80x = 49,605,723,245.76
  5. Step 5: Solve for x
    x = 49,605,723,245.76/323,760.80
  6. Step 6: Final answer
    x = 153,217.20

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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.