Home / 2,122.88-2,929.85-1,191.38

Finding the Fourth Proportional to 2,122.88, 2,929.85 and 1,191.38

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Solution

The fourth proportional to 2,122.88, 2,929.85 and 1,191.38 is: 1,644.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.88 : 2,929.85 = 1,191.38 : x
  2. Step 2: Convert to fraction form
    2,122.88/2,929.85 = 1,191.38/x
  3. Step 3: Cross multiply
    2,122.88x = 2,929.85 × 1,191.38
  4. Step 4: Simplify right side
    2,122.88x = 3,490,544.09
  5. Step 5: Solve for x
    x = 3,490,544.09/2,122.88
  6. Step 6: Final answer
    x = 1,644.25

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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.