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Finding the Fourth Proportional to 664,280.70, 996,421.05 and 612,959.10

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Solution

The fourth proportional to 664,280.70, 996,421.05 and 612,959.10 is: 919,438.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,280.70 : 996,421.05 = 612,959.10 : x
  2. Step 2: Convert to fraction form
    664,280.70/996,421.05 = 612,959.10/x
  3. Step 3: Cross multiply
    664,280.70x = 996,421.05 × 612,959.10
  4. Step 4: Simplify right side
    664,280.70x = 610,765,350,029.06
  5. Step 5: Solve for x
    x = 610,765,350,029.06/664,280.70
  6. Step 6: Final answer
    x = 919,438.65

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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.