Home / 693,478.80-1,040,218.20-320,230.80

Finding the Fourth Proportional to 693,478.80, 1,040,218.20 and 320,230.80

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Solution

The fourth proportional to 693,478.80, 1,040,218.20 and 320,230.80 is: 480,346.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,478.80 : 1,040,218.20 = 320,230.80 : x
  2. Step 2: Convert to fraction form
    693,478.80/1,040,218.20 = 320,230.80/x
  3. Step 3: Cross multiply
    693,478.80x = 1,040,218.20 × 320,230.80
  4. Step 4: Simplify right side
    693,478.80x = 333,109,906,360.56
  5. Step 5: Solve for x
    x = 333,109,906,360.56/693,478.80
  6. Step 6: Final answer
    x = 480,346.20

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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.