Home / 2,986.24-4,121.12-1,660

Finding the Fourth Proportional to 2,986.24, 4,121.12 and 1,660

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Solution

The fourth proportional to 2,986.24, 4,121.12 and 1,660 is: 2,290.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.24 : 4,121.12 = 1,660 : x
  2. Step 2: Convert to fraction form
    2,986.24/4,121.12 = 1,660/x
  3. Step 3: Cross multiply
    2,986.24x = 4,121.12 × 1,660
  4. Step 4: Simplify right side
    2,986.24x = 6,841,059.20
  5. Step 5: Solve for x
    x = 6,841,059.20/2,986.24
  6. Step 6: Final answer
    x = 2,290.86

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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.