Home / 809,331.20-1,213,996.80-389,427.20

Finding the Fourth Proportional to 809,331.20, 1,213,996.80 and 389,427.20

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Solution

The fourth proportional to 809,331.20, 1,213,996.80 and 389,427.20 is: 584,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,331.20 : 1,213,996.80 = 389,427.20 : x
  2. Step 2: Convert to fraction form
    809,331.20/1,213,996.80 = 389,427.20/x
  3. Step 3: Cross multiply
    809,331.20x = 1,213,996.80 × 389,427.20
  4. Step 4: Simplify right side
    809,331.20x = 472,763,374,632.96
  5. Step 5: Solve for x
    x = 472,763,374,632.96/809,331.20
  6. Step 6: Final answer
    x = 584,140.80

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Double scale
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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.