Home / 2,104.40-3,153.40-1,989.20

Finding the Fourth Proportional to 2,104.40, 3,153.40 and 1,989.20

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Solution

The fourth proportional to 2,104.40, 3,153.40 and 1,989.20 is: 2,980.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.40 : 3,153.40 = 1,989.20 : x
  2. Step 2: Convert to fraction form
    2,104.40/3,153.40 = 1,989.20/x
  3. Step 3: Cross multiply
    2,104.40x = 3,153.40 × 1,989.20
  4. Step 4: Simplify right side
    2,104.40x = 6,272,743.28
  5. Step 5: Solve for x
    x = 6,272,743.28/2,104.40
  6. Step 6: Final answer
    x = 2,980.78

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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.