Home / 2,291.14-3,161.76-1,243.21

Finding the Fourth Proportional to 2,291.14, 3,161.76 and 1,243.21

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Solution

The fourth proportional to 2,291.14, 3,161.76 and 1,243.21 is: 1,715.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.14 : 3,161.76 = 1,243.21 : x
  2. Step 2: Convert to fraction form
    2,291.14/3,161.76 = 1,243.21/x
  3. Step 3: Cross multiply
    2,291.14x = 3,161.76 × 1,243.21
  4. Step 4: Simplify right side
    2,291.14x = 3,930,731.65
  5. Step 5: Solve for x
    x = 3,930,731.65/2,291.14
  6. Step 6: Final answer
    x = 1,715.62

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1.5x scale

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.