Home / 1,243.40-1,865.09-550.39

Finding the Fourth Proportional to 1,243.40, 1,865.09 and 550.39

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Solution

The fourth proportional to 1,243.40, 1,865.09 and 550.39 is: 825.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.40 : 1,865.09 = 550.39 : x
  2. Step 2: Convert to fraction form
    1,243.40/1,865.09 = 550.39/x
  3. Step 3: Cross multiply
    1,243.40x = 1,865.09 × 550.39
  4. Step 4: Simplify right side
    1,243.40x = 1,026,519.47
  5. Step 5: Solve for x
    x = 1,026,519.47/1,243.40
  6. Step 6: Final answer
    x = 825.58

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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.