Home / 638,421.60-957,632.40-449,464.80

Finding the Fourth Proportional to 638,421.60, 957,632.40 and 449,464.80

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Solution

The fourth proportional to 638,421.60, 957,632.40 and 449,464.80 is: 674,197.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,421.60 : 957,632.40 = 449,464.80 : x
  2. Step 2: Convert to fraction form
    638,421.60/957,632.40 = 449,464.80/x
  3. Step 3: Cross multiply
    638,421.60x = 957,632.40 × 449,464.80
  4. Step 4: Simplify right side
    638,421.60x = 430,422,055,139.52
  5. Step 5: Solve for x
    x = 430,422,055,139.52/638,421.60
  6. Step 6: Final answer
    x = 674,197.20

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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.