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Finding the Fourth Proportional to 664,287.80, 996,431.70 and 398,348.60

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Solution

The fourth proportional to 664,287.80, 996,431.70 and 398,348.60 is: 597,522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,287.80 : 996,431.70 = 398,348.60 : x
  2. Step 2: Convert to fraction form
    664,287.80/996,431.70 = 398,348.60/x
  3. Step 3: Cross multiply
    664,287.80x = 996,431.70 × 398,348.60
  4. Step 4: Simplify right side
    664,287.80x = 396,927,172,690.62
  5. Step 5: Solve for x
    x = 396,927,172,690.62/664,287.80
  6. Step 6: Final answer
    x = 597,522.90

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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.