Home / 2,290.79-3,161.28-1,242.86

Finding the Fourth Proportional to 2,290.79, 3,161.28 and 1,242.86

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Solution

The fourth proportional to 2,290.79, 3,161.28 and 1,242.86 is: 1,715.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,290.79 : 3,161.28 = 1,242.86 : x
  2. Step 2: Convert to fraction form
    2,290.79/3,161.28 = 1,242.86/x
  3. Step 3: Cross multiply
    2,290.79x = 3,161.28 × 1,242.86
  4. Step 4: Simplify right side
    2,290.79x = 3,929,012.65
  5. Step 5: Solve for x
    x = 3,929,012.65/2,290.79
  6. Step 6: Final answer
    x = 1,715.13

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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.