Home / 1,991.11-2,988.29-837.67

Finding the Fourth Proportional to 1,991.11, 2,988.29 and 837.67

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Solution

The fourth proportional to 1,991.11, 2,988.29 and 837.67 is: 1,257.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.11 : 2,988.29 = 837.67 : x
  2. Step 2: Convert to fraction form
    1,991.11/2,988.29 = 837.67/x
  3. Step 3: Cross multiply
    1,991.11x = 2,988.29 × 837.67
  4. Step 4: Simplify right side
    1,991.11x = 2,503,200.88
  5. Step 5: Solve for x
    x = 2,503,200.88/1,991.11
  6. Step 6: Final answer
    x = 1,257.19

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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.