Home / 2,105.10-3,160.38-1,489.10

Finding the Fourth Proportional to 2,105.10, 3,160.38 and 1,489.10

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Solution

The fourth proportional to 2,105.10, 3,160.38 and 1,489.10 is: 2,235.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.10 : 3,160.38 = 1,489.10 : x
  2. Step 2: Convert to fraction form
    2,105.10/3,160.38 = 1,489.10/x
  3. Step 3: Cross multiply
    2,105.10x = 3,160.38 × 1,489.10
  4. Step 4: Simplify right side
    2,105.10x = 4,706,106.06
  5. Step 5: Solve for x
    x = 4,706,106.06/2,105.10
  6. Step 6: Final answer
    x = 2,235.57

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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.