Home / 1,949.49-2,690.46-1,287.63

Finding the Fourth Proportional to 1,949.49, 2,690.46 and 1,287.63

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Solution

The fourth proportional to 1,949.49, 2,690.46 and 1,287.63 is: 1,777.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.49 : 2,690.46 = 1,287.63 : x
  2. Step 2: Convert to fraction form
    1,949.49/2,690.46 = 1,287.63/x
  3. Step 3: Cross multiply
    1,949.49x = 2,690.46 × 1,287.63
  4. Step 4: Simplify right side
    1,949.49x = 3,464,317.01
  5. Step 5: Solve for x
    x = 3,464,317.01/1,949.49
  6. Step 6: Final answer
    x = 1,777.04

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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.