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Finding the Fourth Proportional to 664,633.90, 996,950.85 and 221,401.90

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Solution

The fourth proportional to 664,633.90, 996,950.85 and 221,401.90 is: 332,102.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,633.90 : 996,950.85 = 221,401.90 : x
  2. Step 2: Convert to fraction form
    664,633.90/996,950.85 = 221,401.90/x
  3. Step 3: Cross multiply
    664,633.90x = 996,950.85 × 221,401.90
  4. Step 4: Simplify right side
    664,633.90x = 220,726,812,396.62
  5. Step 5: Solve for x
    x = 220,726,812,396.62/664,633.90
  6. Step 6: Final answer
    x = 332,102.85

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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.