Home / 638,837.20-958,255.80-479,404.90

Finding the Fourth Proportional to 638,837.20, 958,255.80 and 479,404.90

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Solution

The fourth proportional to 638,837.20, 958,255.80 and 479,404.90 is: 719,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,837.20 : 958,255.80 = 479,404.90 : x
  2. Step 2: Convert to fraction form
    638,837.20/958,255.80 = 479,404.90/x
  3. Step 3: Cross multiply
    638,837.20x = 958,255.80 × 479,404.90
  4. Step 4: Simplify right side
    638,837.20x = 459,392,525,973.42
  5. Step 5: Solve for x
    x = 459,392,525,973.42/638,837.20
  6. Step 6: Final answer
    x = 719,107.35

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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.