Home / 2,290.73-3,161.20-1,242.79

Finding the Fourth Proportional to 2,290.73, 3,161.20 and 1,242.79

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Solution

The fourth proportional to 2,290.73, 3,161.20 and 1,242.79 is: 1,715.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,290.73 : 3,161.20 = 1,242.79 : x
  2. Step 2: Convert to fraction form
    2,290.73/3,161.20 = 1,242.79/x
  3. Step 3: Cross multiply
    2,290.73x = 3,161.20 × 1,242.79
  4. Step 4: Simplify right side
    2,290.73x = 3,928,707.75
  5. Step 5: Solve for x
    x = 3,928,707.75/2,290.73
  6. Step 6: Final answer
    x = 1,715.05

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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.