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Finding the Fourth Proportional to 311,927.20, 467,234.70 and 259,439.20

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Solution

The fourth proportional to 311,927.20, 467,234.70 and 259,439.20 is: 388,613.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,927.20 : 467,234.70 = 259,439.20 : x
  2. Step 2: Convert to fraction form
    311,927.20/467,234.70 = 259,439.20/x
  3. Step 3: Cross multiply
    311,927.20x = 467,234.70 × 259,439.20
  4. Step 4: Simplify right side
    311,927.20x = 121,218,996,780.24
  5. Step 5: Solve for x
    x = 121,218,996,780.24/311,927.20
  6. Step 6: Final answer
    x = 388,613.10

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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.