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Finding the Fourth Proportional to 664,693.40, 997,040.10 and 620,078.60

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Solution

The fourth proportional to 664,693.40, 997,040.10 and 620,078.60 is: 930,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,693.40 : 997,040.10 = 620,078.60 : x
  2. Step 2: Convert to fraction form
    664,693.40/997,040.10 = 620,078.60/x
  3. Step 3: Cross multiply
    664,693.40x = 997,040.10 × 620,078.60
  4. Step 4: Simplify right side
    664,693.40x = 618,243,229,351.86
  5. Step 5: Solve for x
    x = 618,243,229,351.86/664,693.40
  6. Step 6: Final answer
    x = 930,117.90

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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.