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Finding the Third Proportional to 1,381.63 and 2,187.75

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Solution

The third proportional to 1,381.63 and 2,187.75 is: 3,464.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.63 : 2,187.75 = 2,187.75 : x
  2. Step 2: Convert to fraction form
    1,381.63/2,187.75 = 2,187.75/x
  3. Step 3: Cross multiply
    1,381.63x = 2,187.75 × 2,187.75
  4. Step 4: Simplify right side
    1,381.63x = 4,786,250.06
  5. Step 5: Solve for x
    x = 4,786,250.06/1,381.63
  6. Step 6: Final answer
    x = 3,464.22

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.