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Finding the Fourth Proportional to 329,427.60, 494,141.40 and 80,109.60

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Solution

The fourth proportional to 329,427.60, 494,141.40 and 80,109.60 is: 120,164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,427.60 : 494,141.40 = 80,109.60 : x
  2. Step 2: Convert to fraction form
    329,427.60/494,141.40 = 80,109.60/x
  3. Step 3: Cross multiply
    329,427.60x = 494,141.40 × 80,109.60
  4. Step 4: Simplify right side
    329,427.60x = 39,585,469,897.44
  5. Step 5: Solve for x
    x = 39,585,469,897.44/329,427.60
  6. Step 6: Final answer
    x = 120,164.40

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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.