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Finding the Third Proportional to 921.94 and 2,131.88

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Solution

The third proportional to 921.94 and 2,131.88 is: 4,929.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.94 : 2,131.88 = 2,131.88 : x
  2. Step 2: Convert to fraction form
    921.94/2,131.88 = 2,131.88/x
  3. Step 3: Cross multiply
    921.94x = 2,131.88 × 2,131.88
  4. Step 4: Simplify right side
    921.94x = 4,544,891.02
  5. Step 5: Solve for x
    x = 4,544,891.02/921.94
  6. Step 6: Final answer
    x = 4,929.72

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.