Home / 458,002.20-687,003.30-409,013.40

Finding the Fourth Proportional to 458,002.20, 687,003.30 and 409,013.40

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Solution

The fourth proportional to 458,002.20, 687,003.30 and 409,013.40 is: 613,520.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,002.20 : 687,003.30 = 409,013.40 : x
  2. Step 2: Convert to fraction form
    458,002.20/687,003.30 = 409,013.40/x
  3. Step 3: Cross multiply
    458,002.20x = 687,003.30 × 409,013.40
  4. Step 4: Simplify right side
    458,002.20x = 280,993,555,544.22
  5. Step 5: Solve for x
    x = 280,993,555,544.22/458,002.20
  6. Step 6: Final answer
    x = 613,520.10

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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.