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Finding the Fourth Proportional to 329,803.70, 494,705.55 and 80,485.70

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Solution

The fourth proportional to 329,803.70, 494,705.55 and 80,485.70 is: 120,728.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,803.70 : 494,705.55 = 80,485.70 : x
  2. Step 2: Convert to fraction form
    329,803.70/494,705.55 = 80,485.70/x
  3. Step 3: Cross multiply
    329,803.70x = 494,705.55 × 80,485.70
  4. Step 4: Simplify right side
    329,803.70x = 39,816,722,485.64
  5. Step 5: Solve for x
    x = 39,816,722,485.64/329,803.70
  6. Step 6: Final answer
    x = 120,728.55

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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.