Home / 1,380.09-2,067.70-1,297.87

Finding the Fourth Proportional to 1,380.09, 2,067.70 and 1,297.87

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Solution

The fourth proportional to 1,380.09, 2,067.70 and 1,297.87 is: 1,944.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.09 : 2,067.70 = 1,297.87 : x
  2. Step 2: Convert to fraction form
    1,380.09/2,067.70 = 1,297.87/x
  3. Step 3: Cross multiply
    1,380.09x = 2,067.70 × 1,297.87
  4. Step 4: Simplify right side
    1,380.09x = 2,683,602.55
  5. Step 5: Solve for x
    x = 2,683,602.55/1,380.09
  6. Step 6: Final answer
    x = 1,944.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.