Home / 2,689.21-4,035.39-1,129.10

Finding the Fourth Proportional to 2,689.21, 4,035.39 and 1,129.10

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Solution

The fourth proportional to 2,689.21, 4,035.39 and 1,129.10 is: 1,694.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.21 : 4,035.39 = 1,129.10 : x
  2. Step 2: Convert to fraction form
    2,689.21/4,035.39 = 1,129.10/x
  3. Step 3: Cross multiply
    2,689.21x = 4,035.39 × 1,129.10
  4. Step 4: Simplify right side
    2,689.21x = 4,556,346.80
  5. Step 5: Solve for x
    x = 4,556,346.80/2,689.21
  6. Step 6: Final answer
    x = 1,694.31

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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.