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Finding the Fourth Proportional to 329,809.20, 494,713.80 and 80,491.20

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Solution

The fourth proportional to 329,809.20, 494,713.80 and 80,491.20 is: 120,736.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,809.20 : 494,713.80 = 80,491.20 : x
  2. Step 2: Convert to fraction form
    329,809.20/494,713.80 = 80,491.20/x
  3. Step 3: Cross multiply
    329,809.20x = 494,713.80 × 80,491.20
  4. Step 4: Simplify right side
    329,809.20x = 39,820,107,418.56
  5. Step 5: Solve for x
    x = 39,820,107,418.56/329,809.20
  6. Step 6: Final answer
    x = 120,736.80

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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.