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Finding the Fourth Proportional to 279,891.05, 386,235.08 and 159,015.56

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Solution

The fourth proportional to 279,891.05, 386,235.08 and 159,015.56 is: 219,433.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,891.05 : 386,235.08 = 159,015.56 : x
  2. Step 2: Convert to fraction form
    279,891.05/386,235.08 = 159,015.56/x
  3. Step 3: Cross multiply
    279,891.05x = 386,235.08 × 159,015.56
  4. Step 4: Simplify right side
    279,891.05x = 61,417,388,900.97
  5. Step 5: Solve for x
    x = 61,417,388,900.97/279,891.05
  6. Step 6: Final answer
    x = 219,433.20

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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.