Home / 1,401.90-2,104.67-991.23

Finding the Fourth Proportional to 1,401.90, 2,104.67 and 991.23

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Solution

The fourth proportional to 1,401.90, 2,104.67 and 991.23 is: 1,488.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.90 : 2,104.67 = 991.23 : x
  2. Step 2: Convert to fraction form
    1,401.90/2,104.67 = 991.23/x
  3. Step 3: Cross multiply
    1,401.90x = 2,104.67 × 991.23
  4. Step 4: Simplify right side
    1,401.90x = 2,086,207.09
  5. Step 5: Solve for x
    x = 2,086,207.09/1,401.90
  6. Step 6: Final answer
    x = 1,488.13

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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.