Home / 1,949.20-2,689.68-1,556.08

Finding the Fourth Proportional to 1,949.20, 2,689.68 and 1,556.08

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Solution

The fourth proportional to 1,949.20, 2,689.68 and 1,556.08 is: 2,147.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.20 : 2,689.68 = 1,556.08 : x
  2. Step 2: Convert to fraction form
    1,949.20/2,689.68 = 1,556.08/x
  3. Step 3: Cross multiply
    1,949.20x = 2,689.68 × 1,556.08
  4. Step 4: Simplify right side
    1,949.20x = 4,185,357.25
  5. Step 5: Solve for x
    x = 4,185,357.25/1,949.20
  6. Step 6: Final answer
    x = 2,147.22

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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.