Home / 454,986.60-682,479.90-420,772.20

Finding the Fourth Proportional to 454,986.60, 682,479.90 and 420,772.20

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Solution

The fourth proportional to 454,986.60, 682,479.90 and 420,772.20 is: 631,158.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,986.60 : 682,479.90 = 420,772.20 : x
  2. Step 2: Convert to fraction form
    454,986.60/682,479.90 = 420,772.20/x
  3. Step 3: Cross multiply
    454,986.60x = 682,479.90 × 420,772.20
  4. Step 4: Simplify right side
    454,986.60x = 287,168,568,978.78
  5. Step 5: Solve for x
    x = 287,168,568,978.78/454,986.60
  6. Step 6: Final answer
    x = 631,158.30

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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.