Home / 1,396.51-2,091.15-1,187.73

Finding the Fourth Proportional to 1,396.51, 2,091.15 and 1,187.73

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Solution

The fourth proportional to 1,396.51, 2,091.15 and 1,187.73 is: 1,778.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.51 : 2,091.15 = 1,187.73 : x
  2. Step 2: Convert to fraction form
    1,396.51/2,091.15 = 1,187.73/x
  3. Step 3: Cross multiply
    1,396.51x = 2,091.15 × 1,187.73
  4. Step 4: Simplify right side
    1,396.51x = 2,483,721.59
  5. Step 5: Solve for x
    x = 2,483,721.59/1,396.51
  6. Step 6: Final answer
    x = 1,778.52

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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.