Home / 693,390.80-1,040,086.20-320,142.80

Finding the Fourth Proportional to 693,390.80, 1,040,086.20 and 320,142.80

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Solution

The fourth proportional to 693,390.80, 1,040,086.20 and 320,142.80 is: 480,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,390.80 : 1,040,086.20 = 320,142.80 : x
  2. Step 2: Convert to fraction form
    693,390.80/1,040,086.20 = 320,142.80/x
  3. Step 3: Cross multiply
    693,390.80x = 1,040,086.20 × 320,142.80
  4. Step 4: Simplify right side
    693,390.80x = 332,976,108,309.36
  5. Step 5: Solve for x
    x = 332,976,108,309.36/693,390.80
  6. Step 6: Final answer
    x = 480,214.20

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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.