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Finding the Fourth Proportional to 259,330, 388,995 and 84,226

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Solution

The fourth proportional to 259,330, 388,995 and 84,226 is: 126,339

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,330 : 388,995 = 84,226 : x
  2. Step 2: Convert to fraction form
    259,330/388,995 = 84,226/x
  3. Step 3: Cross multiply
    259,330x = 388,995 × 84,226
  4. Step 4: Simplify right side
    259,330x = 32,763,492,870
  5. Step 5: Solve for x
    x = 32,763,492,870/259,330
  6. Step 6: Final answer
    x = 126,339

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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.