Home / 2,947.31-4,067.11-1,688.57

Finding the Fourth Proportional to 2,947.31, 4,067.11 and 1,688.57

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Solution

The fourth proportional to 2,947.31, 4,067.11 and 1,688.57 is: 2,330.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.31 : 4,067.11 = 1,688.57 : x
  2. Step 2: Convert to fraction form
    2,947.31/4,067.11 = 1,688.57/x
  3. Step 3: Cross multiply
    2,947.31x = 4,067.11 × 1,688.57
  4. Step 4: Simplify right side
    2,947.31x = 6,867,599.93
  5. Step 5: Solve for x
    x = 6,867,599.93/2,947.31
  6. Step 6: Final answer
    x = 2,330.12

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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.