Home / 2,765.78-4,148.69-1,121.24

Finding the Fourth Proportional to 2,765.78, 4,148.69 and 1,121.24

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Solution

The fourth proportional to 2,765.78, 4,148.69 and 1,121.24 is: 1,681.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,765.78 : 4,148.69 = 1,121.24 : x
  2. Step 2: Convert to fraction form
    2,765.78/4,148.69 = 1,121.24/x
  3. Step 3: Cross multiply
    2,765.78x = 4,148.69 × 1,121.24
  4. Step 4: Simplify right side
    2,765.78x = 4,651,681.94
  5. Step 5: Solve for x
    x = 4,651,681.94/2,765.78
  6. Step 6: Final answer
    x = 1,681.87

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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.