Home / 2,290.78-3,161.33-1,242.84

Finding the Fourth Proportional to 2,290.78, 3,161.33 and 1,242.84

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Solution

The fourth proportional to 2,290.78, 3,161.33 and 1,242.84 is: 1,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,290.78 : 3,161.33 = 1,242.84 : x
  2. Step 2: Convert to fraction form
    2,290.78/3,161.33 = 1,242.84/x
  3. Step 3: Cross multiply
    2,290.78x = 3,161.33 × 1,242.84
  4. Step 4: Simplify right side
    2,290.78x = 3,929,037.68
  5. Step 5: Solve for x
    x = 3,929,037.68/2,290.78
  6. Step 6: Final answer
    x = 1,715.15

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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.