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Finding the Fourth Proportional to 486,040.80, 729,061.20 and 309,331.20

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Solution

The fourth proportional to 486,040.80, 729,061.20 and 309,331.20 is: 463,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,040.80 : 729,061.20 = 309,331.20 : x
  2. Step 2: Convert to fraction form
    486,040.80/729,061.20 = 309,331.20/x
  3. Step 3: Cross multiply
    486,040.80x = 729,061.20 × 309,331.20
  4. Step 4: Simplify right side
    486,040.80x = 225,521,375,869.44
  5. Step 5: Solve for x
    x = 225,521,375,869.44/486,040.80
  6. Step 6: Final answer
    x = 463,996.80

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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.