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Finding the Fourth Proportional to 279,847.47, 386,198.52 and 158,986.56

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Solution

The fourth proportional to 279,847.47, 386,198.52 and 158,986.56 is: 219,406.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,847.47 : 386,198.52 = 158,986.56 : x
  2. Step 2: Convert to fraction form
    279,847.47/386,198.52 = 158,986.56/x
  3. Step 3: Cross multiply
    279,847.47x = 386,198.52 × 158,986.56
  4. Step 4: Simplify right side
    279,847.47x = 61,400,374,171.89
  5. Step 5: Solve for x
    x = 61,400,374,171.89/279,847.47
  6. Step 6: Final answer
    x = 219,406.57

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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.