Home / 1,372.86-1,890.27-1,243.26

Finding the Fourth Proportional to 1,372.86, 1,890.27 and 1,243.26

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Solution

The fourth proportional to 1,372.86, 1,890.27 and 1,243.26 is: 1,711.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.86 : 1,890.27 = 1,243.26 : x
  2. Step 2: Convert to fraction form
    1,372.86/1,890.27 = 1,243.26/x
  3. Step 3: Cross multiply
    1,372.86x = 1,890.27 × 1,243.26
  4. Step 4: Simplify right side
    1,372.86x = 2,350,097.08
  5. Step 5: Solve for x
    x = 2,350,097.08/1,372.86
  6. Step 6: Final answer
    x = 1,711.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.