Home / 638,218.20-957,327.30-520,120.20

Finding the Fourth Proportional to 638,218.20, 957,327.30 and 520,120.20

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Solution

The fourth proportional to 638,218.20, 957,327.30 and 520,120.20 is: 780,180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,218.20 : 957,327.30 = 520,120.20 : x
  2. Step 2: Convert to fraction form
    638,218.20/957,327.30 = 520,120.20/x
  3. Step 3: Cross multiply
    638,218.20x = 957,327.30 × 520,120.20
  4. Step 4: Simplify right side
    638,218.20x = 497,925,266,741.46
  5. Step 5: Solve for x
    x = 497,925,266,741.46/638,218.20
  6. Step 6: Final answer
    x = 780,180.30

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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.