Home / 1,238.78-1,860.09-1,067.36

Finding the Fourth Proportional to 1,238.78, 1,860.09 and 1,067.36

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Solution

The fourth proportional to 1,238.78, 1,860.09 and 1,067.36 is: 1,602.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.78 : 1,860.09 = 1,067.36 : x
  2. Step 2: Convert to fraction form
    1,238.78/1,860.09 = 1,067.36/x
  3. Step 3: Cross multiply
    1,238.78x = 1,860.09 × 1,067.36
  4. Step 4: Simplify right side
    1,238.78x = 1,985,376.36
  5. Step 5: Solve for x
    x = 1,985,376.36/1,238.78
  6. Step 6: Final answer
    x = 1,602.69

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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.