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Finding the Third Proportional to 909.56 and 1,372.78

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Solution

The third proportional to 909.56 and 1,372.78 is: 2,071.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.56 : 1,372.78 = 1,372.78 : x
  2. Step 2: Convert to fraction form
    909.56/1,372.78 = 1,372.78/x
  3. Step 3: Cross multiply
    909.56x = 1,372.78 × 1,372.78
  4. Step 4: Simplify right side
    909.56x = 1,884,528.36
  5. Step 5: Solve for x
    x = 1,884,528.36/909.56
  6. Step 6: Final answer
    x = 2,071.91

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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.