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Finding the Fourth Proportional to 638,519.60, 957,779.40 and 514,103.60

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Solution

The fourth proportional to 638,519.60, 957,779.40 and 514,103.60 is: 771,155.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,519.60 : 957,779.40 = 514,103.60 : x
  2. Step 2: Convert to fraction form
    638,519.60/957,779.40 = 514,103.60/x
  3. Step 3: Cross multiply
    638,519.60x = 957,779.40 × 514,103.60
  4. Step 4: Simplify right side
    638,519.60x = 492,397,837,545.84
  5. Step 5: Solve for x
    x = 492,397,837,545.84/638,519.60
  6. Step 6: Final answer
    x = 771,155.40

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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.