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Finding the Fourth Proportional to 311,857.20, 467,129.70 and 259,369.20

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Solution

The fourth proportional to 311,857.20, 467,129.70 and 259,369.20 is: 388,508.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,857.20 : 467,129.70 = 259,369.20 : x
  2. Step 2: Convert to fraction form
    311,857.20/467,129.70 = 259,369.20/x
  3. Step 3: Cross multiply
    311,857.20x = 467,129.70 × 259,369.20
  4. Step 4: Simplify right side
    311,857.20x = 121,159,056,585.24
  5. Step 5: Solve for x
    x = 121,159,056,585.24/311,857.20
  6. Step 6: Final answer
    x = 388,508.13

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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.