Home / 1,949.64-2,689.92-1,286.34

Finding the Fourth Proportional to 1,949.64, 2,689.92 and 1,286.34

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Solution

The fourth proportional to 1,949.64, 2,689.92 and 1,286.34 is: 1,774.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.64 : 2,689.92 = 1,286.34 : x
  2. Step 2: Convert to fraction form
    1,949.64/2,689.92 = 1,286.34/x
  3. Step 3: Cross multiply
    1,949.64x = 2,689.92 × 1,286.34
  4. Step 4: Simplify right side
    1,949.64x = 3,460,151.69
  5. Step 5: Solve for x
    x = 3,460,151.69/1,949.64
  6. Step 6: Final answer
    x = 1,774.76

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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.