Home / 1,327.56-1,991.66-938.31

Finding the Fourth Proportional to 1,327.56, 1,991.66 and 938.31

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Solution

The fourth proportional to 1,327.56, 1,991.66 and 938.31 is: 1,407.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.56 : 1,991.66 = 938.31 : x
  2. Step 2: Convert to fraction form
    1,327.56/1,991.66 = 938.31/x
  3. Step 3: Cross multiply
    1,327.56x = 1,991.66 × 938.31
  4. Step 4: Simplify right side
    1,327.56x = 1,868,794.49
  5. Step 5: Solve for x
    x = 1,868,794.49/1,327.56
  6. Step 6: Final answer
    x = 1,407.69

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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.