Home / 2,868.96-3,959.49-1,690

Finding the Fourth Proportional to 2,868.96, 3,959.49 and 1,690

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Solution

The fourth proportional to 2,868.96, 3,959.49 and 1,690 is: 2,332.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.96 : 3,959.49 = 1,690 : x
  2. Step 2: Convert to fraction form
    2,868.96/3,959.49 = 1,690/x
  3. Step 3: Cross multiply
    2,868.96x = 3,959.49 × 1,690
  4. Step 4: Simplify right side
    2,868.96x = 6,691,538.10
  5. Step 5: Solve for x
    x = 6,691,538.10/2,868.96
  6. Step 6: Final answer
    x = 2,332.39

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1.5x scale

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.