Home / 638,197.20-957,295.80-520,099.20

Finding the Fourth Proportional to 638,197.20, 957,295.80 and 520,099.20

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Solution

The fourth proportional to 638,197.20, 957,295.80 and 520,099.20 is: 780,148.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,197.20 : 957,295.80 = 520,099.20 : x
  2. Step 2: Convert to fraction form
    638,197.20/957,295.80 = 520,099.20/x
  3. Step 3: Cross multiply
    638,197.20x = 957,295.80 × 520,099.20
  4. Step 4: Simplify right side
    638,197.20x = 497,888,779,743.36
  5. Step 5: Solve for x
    x = 497,888,779,743.36/638,197.20
  6. Step 6: Final answer
    x = 780,148.80

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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.