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Finding the Third Proportional to 1,422.19 and 2,153.16

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Solution

The third proportional to 1,422.19 and 2,153.16 is: 3,259.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.19 : 2,153.16 = 2,153.16 : x
  2. Step 2: Convert to fraction form
    1,422.19/2,153.16 = 2,153.16/x
  3. Step 3: Cross multiply
    1,422.19x = 2,153.16 × 2,153.16
  4. Step 4: Simplify right side
    1,422.19x = 4,636,081.84
  5. Step 5: Solve for x
    x = 4,636,081.84/1,422.19
  6. Step 6: Final answer
    x = 3,259.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.