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Finding the Fourth Proportional to 638,543.40, 957,815.10 and 566,658.60

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Solution

The fourth proportional to 638,543.40, 957,815.10 and 566,658.60 is: 849,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,543.40 : 957,815.10 = 566,658.60 : x
  2. Step 2: Convert to fraction form
    638,543.40/957,815.10 = 566,658.60/x
  3. Step 3: Cross multiply
    638,543.40x = 957,815.10 × 566,658.60
  4. Step 4: Simplify right side
    638,543.40x = 542,754,163,624.86
  5. Step 5: Solve for x
    x = 542,754,163,624.86/638,543.40
  6. Step 6: Final answer
    x = 849,987.90

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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.