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Finding the Fourth Proportional to 543,321.20, 814,981.80 and 318,789.20

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Solution

The fourth proportional to 543,321.20, 814,981.80 and 318,789.20 is: 478,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,321.20 : 814,981.80 = 318,789.20 : x
  2. Step 2: Convert to fraction form
    543,321.20/814,981.80 = 318,789.20/x
  3. Step 3: Cross multiply
    543,321.20x = 814,981.80 × 318,789.20
  4. Step 4: Simplify right side
    543,321.20x = 259,807,396,036.56
  5. Step 5: Solve for x
    x = 259,807,396,036.56/543,321.20
  6. Step 6: Final answer
    x = 478,183.80

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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.