Home / 1,611.97-2,225.78-1,238.36

Finding the Fourth Proportional to 1,611.97, 2,225.78 and 1,238.36

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Solution

The fourth proportional to 1,611.97, 2,225.78 and 1,238.36 is: 1,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.97 : 2,225.78 = 1,238.36 : x
  2. Step 2: Convert to fraction form
    1,611.97/2,225.78 = 1,238.36/x
  3. Step 3: Cross multiply
    1,611.97x = 2,225.78 × 1,238.36
  4. Step 4: Simplify right side
    1,611.97x = 2,756,305.16
  5. Step 5: Solve for x
    x = 2,756,305.16/1,611.97
  6. Step 6: Final answer
    x = 1,709.90

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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.