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Finding the Fourth Proportional to 259,285.38, 388,993.67 and 72,296.88

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Solution

The fourth proportional to 259,285.38, 388,993.67 and 72,296.88 is: 108,463.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,285.38 : 388,993.67 = 72,296.88 : x
  2. Step 2: Convert to fraction form
    259,285.38/388,993.67 = 72,296.88/x
  3. Step 3: Cross multiply
    259,285.38x = 388,993.67 × 72,296.88
  4. Step 4: Simplify right side
    259,285.38x = 28,123,028,680.75
  5. Step 5: Solve for x
    x = 28,123,028,680.75/259,285.38
  6. Step 6: Final answer
    x = 108,463.61

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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.