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Finding the Fourth Proportional to 807,760.40, 1,211,640.60 and 802,230.80

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Solution

The fourth proportional to 807,760.40, 1,211,640.60 and 802,230.80 is: 1,203,346.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,760.40 : 1,211,640.60 = 802,230.80 : x
  2. Step 2: Convert to fraction form
    807,760.40/1,211,640.60 = 802,230.80/x
  3. Step 3: Cross multiply
    807,760.40x = 1,211,640.60 × 802,230.80
  4. Step 4: Simplify right side
    807,760.40x = 972,015,407,850.48
  5. Step 5: Solve for x
    x = 972,015,407,850.48/807,760.40
  6. Step 6: Final answer
    x = 1,203,346.20

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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.