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Finding the Fourth Proportional to 329,611.20, 494,416.80 and 80,293.20

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Solution

The fourth proportional to 329,611.20, 494,416.80 and 80,293.20 is: 120,439.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,611.20 : 494,416.80 = 80,293.20 : x
  2. Step 2: Convert to fraction form
    329,611.20/494,416.80 = 80,293.20/x
  3. Step 3: Cross multiply
    329,611.20x = 494,416.80 × 80,293.20
  4. Step 4: Simplify right side
    329,611.20x = 39,698,307,005.76
  5. Step 5: Solve for x
    x = 39,698,307,005.76/329,611.20
  6. Step 6: Final answer
    x = 120,439.80

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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.