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Finding the Third Proportional to 1,211.63 and 1,815.75

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Solution

The third proportional to 1,211.63 and 1,815.75 is: 2,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.63 : 1,815.75 = 1,815.75 : x
  2. Step 2: Convert to fraction form
    1,211.63/1,815.75 = 1,815.75/x
  3. Step 3: Cross multiply
    1,211.63x = 1,815.75 × 1,815.75
  4. Step 4: Simplify right side
    1,211.63x = 3,296,948.06
  5. Step 5: Solve for x
    x = 3,296,948.06/1,211.63
  6. Step 6: Final answer
    x = 2,721.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.