Home / 1,297.55-1,936.84-1,125.42

Finding the Fourth Proportional to 1,297.55, 1,936.84 and 1,125.42

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Solution

The fourth proportional to 1,297.55, 1,936.84 and 1,125.42 is: 1,679.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.55 : 1,936.84 = 1,125.42 : x
  2. Step 2: Convert to fraction form
    1,297.55/1,936.84 = 1,125.42/x
  3. Step 3: Cross multiply
    1,297.55x = 1,936.84 × 1,125.42
  4. Step 4: Simplify right side
    1,297.55x = 2,179,759.88
  5. Step 5: Solve for x
    x = 2,179,759.88/1,297.55
  6. Step 6: Final answer
    x = 1,679.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.