Home / 2,947.65-4,067.75-1,688.71

Finding the Fourth Proportional to 2,947.65, 4,067.75 and 1,688.71

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Solution

The fourth proportional to 2,947.65, 4,067.75 and 1,688.71 is: 2,330.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.65 : 4,067.75 = 1,688.71 : x
  2. Step 2: Convert to fraction form
    2,947.65/4,067.75 = 1,688.71/x
  3. Step 3: Cross multiply
    2,947.65x = 4,067.75 × 1,688.71
  4. Step 4: Simplify right side
    2,947.65x = 6,869,250.10
  5. Step 5: Solve for x
    x = 6,869,250.10/2,947.65
  6. Step 6: Final answer
    x = 2,330.42

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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.