Home / 2,619.19-3,615.20-1,689.31

Finding the Fourth Proportional to 2,619.19, 3,615.20 and 1,689.31

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Solution

The fourth proportional to 2,619.19, 3,615.20 and 1,689.31 is: 2,331.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.19 : 3,615.20 = 1,689.31 : x
  2. Step 2: Convert to fraction form
    2,619.19/3,615.20 = 1,689.31/x
  3. Step 3: Cross multiply
    2,619.19x = 3,615.20 × 1,689.31
  4. Step 4: Simplify right side
    2,619.19x = 6,107,193.51
  5. Step 5: Solve for x
    x = 6,107,193.51/2,619.19
  6. Step 6: Final answer
    x = 2,331.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.