Home / 1,297.35-1,947.85-1,238.57

Finding the Fourth Proportional to 1,297.35, 1,947.85 and 1,238.57

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Solution

The fourth proportional to 1,297.35, 1,947.85 and 1,238.57 is: 1,859.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.35 : 1,947.85 = 1,238.57 : x
  2. Step 2: Convert to fraction form
    1,297.35/1,947.85 = 1,238.57/x
  3. Step 3: Cross multiply
    1,297.35x = 1,947.85 × 1,238.57
  4. Step 4: Simplify right side
    1,297.35x = 2,412,542.38
  5. Step 5: Solve for x
    x = 2,412,542.38/1,297.35
  6. Step 6: Final answer
    x = 1,859.59

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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.