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Finding the Fourth Proportional to 638,000.20, 957,000.30 and 519,902.20

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Solution

The fourth proportional to 638,000.20, 957,000.30 and 519,902.20 is: 779,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,000.20 : 957,000.30 = 519,902.20 : x
  2. Step 2: Convert to fraction form
    638,000.20/957,000.30 = 519,902.20/x
  3. Step 3: Cross multiply
    638,000.20x = 957,000.30 × 519,902.20
  4. Step 4: Simplify right side
    638,000.20x = 497,546,561,370.66
  5. Step 5: Solve for x
    x = 497,546,561,370.66/638,000.20
  6. Step 6: Final answer
    x = 779,853.30

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Half scale
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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.