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Finding the Fourth Proportional to 649,207.60, 973,811.40 and 639,876.40

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Solution

The fourth proportional to 649,207.60, 973,811.40 and 639,876.40 is: 959,814.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,207.60 : 973,811.40 = 639,876.40 : x
  2. Step 2: Convert to fraction form
    649,207.60/973,811.40 = 639,876.40/x
  3. Step 3: Cross multiply
    649,207.60x = 973,811.40 × 639,876.40
  4. Step 4: Simplify right side
    649,207.60x = 623,118,932,910.96
  5. Step 5: Solve for x
    x = 623,118,932,910.96/649,207.60
  6. Step 6: Final answer
    x = 959,814.60

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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.