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Finding the Fourth Proportional to 664,455.90, 996,683.85 and 660,519.30

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Solution

The fourth proportional to 664,455.90, 996,683.85 and 660,519.30 is: 990,778.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,455.90 : 996,683.85 = 660,519.30 : x
  2. Step 2: Convert to fraction form
    664,455.90/996,683.85 = 660,519.30/x
  3. Step 3: Cross multiply
    664,455.90x = 996,683.85 × 660,519.30
  4. Step 4: Simplify right side
    664,455.90x = 658,328,918,923.31
  5. Step 5: Solve for x
    x = 658,328,918,923.31/664,455.90
  6. Step 6: Final answer
    x = 990,778.95

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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.