Home / 693,420.80-1,040,131.20-408,819.20

Finding the Fourth Proportional to 693,420.80, 1,040,131.20 and 408,819.20

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Solution

The fourth proportional to 693,420.80, 1,040,131.20 and 408,819.20 is: 613,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,420.80 : 1,040,131.20 = 408,819.20 : x
  2. Step 2: Convert to fraction form
    693,420.80/1,040,131.20 = 408,819.20/x
  3. Step 3: Cross multiply
    693,420.80x = 1,040,131.20 × 408,819.20
  4. Step 4: Simplify right side
    693,420.80x = 425,225,605,079.04
  5. Step 5: Solve for x
    x = 425,225,605,079.04/693,420.80
  6. Step 6: Final answer
    x = 613,228.80

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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.