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Finding the Fourth Proportional to 664,446.30, 996,669.45 and 398,069.70

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Solution

The fourth proportional to 664,446.30, 996,669.45 and 398,069.70 is: 597,104.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,446.30 : 996,669.45 = 398,069.70 : x
  2. Step 2: Convert to fraction form
    664,446.30/996,669.45 = 398,069.70/x
  3. Step 3: Cross multiply
    664,446.30x = 996,669.45 × 398,069.70
  4. Step 4: Simplify right side
    664,446.30x = 396,743,908,960.67
  5. Step 5: Solve for x
    x = 396,743,908,960.67/664,446.30
  6. Step 6: Final answer
    x = 597,104.55

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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.