Home / 2,690.49-3,713.55-1,643.43

Finding the Fourth Proportional to 2,690.49, 3,713.55 and 1,643.43

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Solution

The fourth proportional to 2,690.49, 3,713.55 and 1,643.43 is: 2,268.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.49 : 3,713.55 = 1,643.43 : x
  2. Step 2: Convert to fraction form
    2,690.49/3,713.55 = 1,643.43/x
  3. Step 3: Cross multiply
    2,690.49x = 3,713.55 × 1,643.43
  4. Step 4: Simplify right side
    2,690.49x = 6,102,959.48
  5. Step 5: Solve for x
    x = 6,102,959.48/2,690.49
  6. Step 6: Final answer
    x = 2,268.34

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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.