Home / 1,390.25-2,087.19-1,175.19

Finding the Fourth Proportional to 1,390.25, 2,087.19 and 1,175.19

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Solution

The fourth proportional to 1,390.25, 2,087.19 and 1,175.19 is: 1,764.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.25 : 2,087.19 = 1,175.19 : x
  2. Step 2: Convert to fraction form
    1,390.25/2,087.19 = 1,175.19/x
  3. Step 3: Cross multiply
    1,390.25x = 2,087.19 × 1,175.19
  4. Step 4: Simplify right side
    1,390.25x = 2,452,844.82
  5. Step 5: Solve for x
    x = 2,452,844.82/1,390.25
  6. Step 6: Final answer
    x = 1,764.33

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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.