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Finding the Fourth Proportional to 679,840.80, 1,019,728.80 and 230,517.60

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Solution

The fourth proportional to 679,840.80, 1,019,728.80 and 230,517.60 is: 345,765.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,840.80 : 1,019,728.80 = 230,517.60 : x
  2. Step 2: Convert to fraction form
    679,840.80/1,019,728.80 = 230,517.60/x
  3. Step 3: Cross multiply
    679,840.80x = 1,019,728.80 × 230,517.60
  4. Step 4: Simplify right side
    679,840.80x = 235,065,435,626.88
  5. Step 5: Solve for x
    x = 235,065,435,626.88/679,840.80
  6. Step 6: Final answer
    x = 345,765.41

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Similar ratio
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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.