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Finding the Fourth Proportional to 280,170, 386,634.60 and 179,568

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Solution

The fourth proportional to 280,170, 386,634.60 and 179,568 is: 247,803.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,170 : 386,634.60 = 179,568 : x
  2. Step 2: Convert to fraction form
    280,170/386,634.60 = 179,568/x
  3. Step 3: Cross multiply
    280,170x = 386,634.60 × 179,568
  4. Step 4: Simplify right side
    280,170x = 69,427,201,852.80
  5. Step 5: Solve for x
    x = 69,427,201,852.80/280,170
  6. Step 6: Final answer
    x = 247,803.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.