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Finding the Fourth Proportional to 279,891.81, 386,236.11 and 159,016.32

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Solution

The fourth proportional to 279,891.81, 386,236.11 and 159,016.32 is: 219,434.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,891.81 : 386,236.11 = 159,016.32 : x
  2. Step 2: Convert to fraction form
    279,891.81/386,236.11 = 159,016.32/x
  3. Step 3: Cross multiply
    279,891.81x = 386,236.11 × 159,016.32
  4. Step 4: Simplify right side
    279,891.81x = 61,417,844,863.32
  5. Step 5: Solve for x
    x = 61,417,844,863.32/279,891.81
  6. Step 6: Final answer
    x = 219,434.23

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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.