Home / 1,327.19-1,991.44-939.68

Finding the Fourth Proportional to 1,327.19, 1,991.44 and 939.68

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Solution

The fourth proportional to 1,327.19, 1,991.44 and 939.68 is: 1,409.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.19 : 1,991.44 = 939.68 : x
  2. Step 2: Convert to fraction form
    1,327.19/1,991.44 = 939.68/x
  3. Step 3: Cross multiply
    1,327.19x = 1,991.44 × 939.68
  4. Step 4: Simplify right side
    1,327.19x = 1,871,304.14
  5. Step 5: Solve for x
    x = 1,871,304.14/1,327.19
  6. Step 6: Final answer
    x = 1,409.98

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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.