Home / 2,139.10-2,953.62-1,640.95

Finding the Fourth Proportional to 2,139.10, 2,953.62 and 1,640.95

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Solution

The fourth proportional to 2,139.10, 2,953.62 and 1,640.95 is: 2,265.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.10 : 2,953.62 = 1,640.95 : x
  2. Step 2: Convert to fraction form
    2,139.10/2,953.62 = 1,640.95/x
  3. Step 3: Cross multiply
    2,139.10x = 2,953.62 × 1,640.95
  4. Step 4: Simplify right side
    2,139.10x = 4,846,727.97
  5. Step 5: Solve for x
    x = 4,846,727.97/2,139.10
  6. Step 6: Final answer
    x = 2,265.78

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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.