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Finding the Fourth Proportional to 664,021.80, 995,903.10 and 220,789.80

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Solution

The fourth proportional to 664,021.80, 995,903.10 and 220,789.80 is: 331,141.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,021.80 : 995,903.10 = 220,789.80 : x
  2. Step 2: Convert to fraction form
    664,021.80/995,903.10 = 220,789.80/x
  3. Step 3: Cross multiply
    664,021.80x = 995,903.10 × 220,789.80
  4. Step 4: Simplify right side
    664,021.80x = 219,885,246,268.38
  5. Step 5: Solve for x
    x = 219,885,246,268.38/664,021.80
  6. Step 6: Final answer
    x = 331,141.61

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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.