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Finding the Third Proportional to 1,172.81 and 2,516.63

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Solution

The third proportional to 1,172.81 and 2,516.63 is: 5,400.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.81 : 2,516.63 = 2,516.63 : x
  2. Step 2: Convert to fraction form
    1,172.81/2,516.63 = 2,516.63/x
  3. Step 3: Cross multiply
    1,172.81x = 2,516.63 × 2,516.63
  4. Step 4: Simplify right side
    1,172.81x = 6,333,401.39
  5. Step 5: Solve for x
    x = 6,333,401.39/1,172.81
  6. Step 6: Final answer
    x = 5,400.18

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.