Home / 2,291.08-3,161.70-1,243.15

Finding the Fourth Proportional to 2,291.08, 3,161.70 and 1,243.15

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Solution

The fourth proportional to 2,291.08, 3,161.70 and 1,243.15 is: 1,715.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.08 : 3,161.70 = 1,243.15 : x
  2. Step 2: Convert to fraction form
    2,291.08/3,161.70 = 1,243.15/x
  3. Step 3: Cross multiply
    2,291.08x = 3,161.70 × 1,243.15
  4. Step 4: Simplify right side
    2,291.08x = 3,930,467.36
  5. Step 5: Solve for x
    x = 3,930,467.36/2,291.08
  6. Step 6: Final answer
    x = 1,715.55

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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.