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Finding the Fourth Proportional to 279,836.56, 386,163.21 and 152,509.42

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Solution

The fourth proportional to 279,836.56, 386,163.21 and 152,509.42 is: 210,456.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,836.56 : 386,163.21 = 152,509.42 : x
  2. Step 2: Convert to fraction form
    279,836.56/386,163.21 = 152,509.42/x
  3. Step 3: Cross multiply
    279,836.56x = 386,163.21 × 152,509.42
  4. Step 4: Simplify right side
    279,836.56x = 58,893,527,182.44
  5. Step 5: Solve for x
    x = 58,893,527,182.44/279,836.56
  6. Step 6: Final answer
    x = 210,456.87

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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.