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Finding the Third Proportional to 1,173.19 and 2,490.38

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Solution

The third proportional to 1,173.19 and 2,490.38 is: 5,286.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.19 : 2,490.38 = 2,490.38 : x
  2. Step 2: Convert to fraction form
    1,173.19/2,490.38 = 2,490.38/x
  3. Step 3: Cross multiply
    1,173.19x = 2,490.38 × 2,490.38
  4. Step 4: Simplify right side
    1,173.19x = 6,201,967.64
  5. Step 5: Solve for x
    x = 6,201,967.64/1,173.19
  6. Step 6: Final answer
    x = 5,286.42

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.