Home / 2,122.59-2,929.19-1,191.09

Finding the Fourth Proportional to 2,122.59, 2,929.19 and 1,191.09

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Solution

The fourth proportional to 2,122.59, 2,929.19 and 1,191.09 is: 1,643.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.59 : 2,929.19 = 1,191.09 : x
  2. Step 2: Convert to fraction form
    2,122.59/2,929.19 = 1,191.09/x
  3. Step 3: Cross multiply
    2,122.59x = 2,929.19 × 1,191.09
  4. Step 4: Simplify right side
    2,122.59x = 3,488,933.95
  5. Step 5: Solve for x
    x = 3,488,933.95/2,122.59
  6. Step 6: Final answer
    x = 1,643.71

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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.