Home / 638,454.80-957,682.20-439,389.20

Finding the Fourth Proportional to 638,454.80, 957,682.20 and 439,389.20

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Solution

The fourth proportional to 638,454.80, 957,682.20 and 439,389.20 is: 659,083.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,454.80 : 957,682.20 = 439,389.20 : x
  2. Step 2: Convert to fraction form
    638,454.80/957,682.20 = 439,389.20/x
  3. Step 3: Cross multiply
    638,454.80x = 957,682.20 × 439,389.20
  4. Step 4: Simplify right side
    638,454.80x = 420,795,215,712.24
  5. Step 5: Solve for x
    x = 420,795,215,712.24/638,454.80
  6. Step 6: Final answer
    x = 659,083.80

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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.