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Finding the Third Proportional to 1,551.38 and 2,220.75

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Solution

The third proportional to 1,551.38 and 2,220.75 is: 3,178.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.38 : 2,220.75 = 2,220.75 : x
  2. Step 2: Convert to fraction form
    1,551.38/2,220.75 = 2,220.75/x
  3. Step 3: Cross multiply
    1,551.38x = 2,220.75 × 2,220.75
  4. Step 4: Simplify right side
    1,551.38x = 4,931,730.56
  5. Step 5: Solve for x
    x = 4,931,730.56/1,551.38
  6. Step 6: Final answer
    x = 3,178.94

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.