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Finding the Fourth Proportional to 651,679.20, 977,518.80 and 629,906.40

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Solution

The fourth proportional to 651,679.20, 977,518.80 and 629,906.40 is: 944,859.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,679.20 : 977,518.80 = 629,906.40 : x
  2. Step 2: Convert to fraction form
    651,679.20/977,518.80 = 629,906.40/x
  3. Step 3: Cross multiply
    651,679.20x = 977,518.80 × 629,906.40
  4. Step 4: Simplify right side
    651,679.20x = 615,745,348,240.32
  5. Step 5: Solve for x
    x = 615,745,348,240.32/651,679.20
  6. Step 6: Final answer
    x = 944,859.60

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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.