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Finding the Third Proportional to 891 and 2,159.16

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Solution

The third proportional to 891 and 2,159.16 is: 5,232.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    891 : 2,159.16 = 2,159.16 : x
  2. Step 2: Convert to fraction form
    891/2,159.16 = 2,159.16/x
  3. Step 3: Cross multiply
    891x = 2,159.16 × 2,159.16
  4. Step 4: Simplify right side
    891x = 4,661,955.71
  5. Step 5: Solve for x
    x = 4,661,955.71/891
  6. Step 6: Final answer
    x = 5,232.27

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.