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Finding the Fourth Proportional to 664,287.80, 996,431.70 and 397,911.20

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Solution

The fourth proportional to 664,287.80, 996,431.70 and 397,911.20 is: 596,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,287.80 : 996,431.70 = 397,911.20 : x
  2. Step 2: Convert to fraction form
    664,287.80/996,431.70 = 397,911.20/x
  3. Step 3: Cross multiply
    664,287.80x = 996,431.70 × 397,911.20
  4. Step 4: Simplify right side
    664,287.80x = 396,491,333,465.04
  5. Step 5: Solve for x
    x = 396,491,333,465.04/664,287.80
  6. Step 6: Final answer
    x = 596,866.80

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Similar ratio
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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.