Home / 2,129.10-3,190.65-1,691.10

Finding the Fourth Proportional to 2,129.10, 3,190.65 and 1,691.10

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Solution

The fourth proportional to 2,129.10, 3,190.65 and 1,691.10 is: 2,534.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.10 : 3,190.65 = 1,691.10 : x
  2. Step 2: Convert to fraction form
    2,129.10/3,190.65 = 1,691.10/x
  3. Step 3: Cross multiply
    2,129.10x = 3,190.65 × 1,691.10
  4. Step 4: Simplify right side
    2,129.10x = 5,395,708.22
  5. Step 5: Solve for x
    x = 5,395,708.22/2,129.10
  6. Step 6: Final answer
    x = 2,534.27

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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.