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Finding the Fourth Proportional to 311,406.80, 467,110.20 and 272,040.80

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Solution

The fourth proportional to 311,406.80, 467,110.20 and 272,040.80 is: 408,061.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,406.80 : 467,110.20 = 272,040.80 : x
  2. Step 2: Convert to fraction form
    311,406.80/467,110.20 = 272,040.80/x
  3. Step 3: Cross multiply
    311,406.80x = 467,110.20 × 272,040.80
  4. Step 4: Simplify right side
    311,406.80x = 127,073,032,496.16
  5. Step 5: Solve for x
    x = 127,073,032,496.16/311,406.80
  6. Step 6: Final answer
    x = 408,061.20

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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.