Home / 2,122.56-2,929.09-1,191.06

Finding the Fourth Proportional to 2,122.56, 2,929.09 and 1,191.06

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Solution

The fourth proportional to 2,122.56, 2,929.09 and 1,191.06 is: 1,643.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.56 : 2,929.09 = 1,191.06 : x
  2. Step 2: Convert to fraction form
    2,122.56/2,929.09 = 1,191.06/x
  3. Step 3: Cross multiply
    2,122.56x = 2,929.09 × 1,191.06
  4. Step 4: Simplify right side
    2,122.56x = 3,488,721.94
  5. Step 5: Solve for x
    x = 3,488,721.94/2,122.56
  6. Step 6: Final answer
    x = 1,643.64

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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.