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Finding the Fourth Proportional to 329,686.80, 494,165.70 and 129,940.80

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Solution

The fourth proportional to 329,686.80, 494,165.70 and 129,940.80 is: 194,767.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,686.80 : 494,165.70 = 129,940.80 : x
  2. Step 2: Convert to fraction form
    329,686.80/494,165.70 = 129,940.80/x
  3. Step 3: Cross multiply
    329,686.80x = 494,165.70 × 129,940.80
  4. Step 4: Simplify right side
    329,686.80x = 64,212,286,390.56
  5. Step 5: Solve for x
    x = 64,212,286,390.56/329,686.80
  6. Step 6: Final answer
    x = 194,767.54

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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.