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Finding the Fourth Proportional to 259,290, 388,935 and 84,186

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Solution

The fourth proportional to 259,290, 388,935 and 84,186 is: 126,279

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,290 : 388,935 = 84,186 : x
  2. Step 2: Convert to fraction form
    259,290/388,935 = 84,186/x
  3. Step 3: Cross multiply
    259,290x = 388,935 × 84,186
  4. Step 4: Simplify right side
    259,290x = 32,742,881,910
  5. Step 5: Solve for x
    x = 32,742,881,910/259,290
  6. Step 6: Final answer
    x = 126,279

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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.