Home / 2,765.17-4,147.61-1,121.28

Finding the Fourth Proportional to 2,765.17, 4,147.61 and 1,121.28

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Solution

The fourth proportional to 2,765.17, 4,147.61 and 1,121.28 is: 1,681.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.17 : 4,147.61 = 1,121.28 : x
  2. Step 2: Convert to fraction form
    2,765.17/4,147.61 = 1,121.28/x
  3. Step 3: Cross multiply
    2,765.17x = 4,147.61 × 1,121.28
  4. Step 4: Simplify right side
    2,765.17x = 4,650,610.98
  5. Step 5: Solve for x
    x = 4,650,610.98/2,765.17
  6. Step 6: Final answer
    x = 1,681.85

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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.