Home / 2,168.14-2,992.20-1,223.92

Finding the Fourth Proportional to 2,168.14, 2,992.20 and 1,223.92

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Solution

The fourth proportional to 2,168.14, 2,992.20 and 1,223.92 is: 1,689.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,168.14 : 2,992.20 = 1,223.92 : x
  2. Step 2: Convert to fraction form
    2,168.14/2,992.20 = 1,223.92/x
  3. Step 3: Cross multiply
    2,168.14x = 2,992.20 × 1,223.92
  4. Step 4: Simplify right side
    2,168.14x = 3,662,213.42
  5. Step 5: Solve for x
    x = 3,662,213.42/2,168.14
  6. Step 6: Final answer
    x = 1,689.10

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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.