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Finding the Third Proportional to 919.88 and 2,169

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Solution

The third proportional to 919.88 and 2,169 is: 5,114.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.88 : 2,169 = 2,169 : x
  2. Step 2: Convert to fraction form
    919.88/2,169 = 2,169/x
  3. Step 3: Cross multiply
    919.88x = 2,169 × 2,169
  4. Step 4: Simplify right side
    919.88x = 4,704,561
  5. Step 5: Solve for x
    x = 4,704,561/919.88
  6. Step 6: Final answer
    x = 5,114.35

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.