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Finding the Fourth Proportional to 649,507.80, 974,261.70 and 612,766.20

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Solution

The fourth proportional to 649,507.80, 974,261.70 and 612,766.20 is: 919,149.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,507.80 : 974,261.70 = 612,766.20 : x
  2. Step 2: Convert to fraction form
    649,507.80/974,261.70 = 612,766.20/x
  3. Step 3: Cross multiply
    649,507.80x = 974,261.70 × 612,766.20
  4. Step 4: Simplify right side
    649,507.80x = 596,994,639,714.54
  5. Step 5: Solve for x
    x = 596,994,639,714.54/649,507.80
  6. Step 6: Final answer
    x = 919,149.30

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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.