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Finding the Third Proportional to 639.56 and 848.92

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Solution

The third proportional to 639.56 and 848.92 is: 1,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.56 : 848.92 = 848.92 : x
  2. Step 2: Convert to fraction form
    639.56/848.92 = 848.92/x
  3. Step 3: Cross multiply
    639.56x = 848.92 × 848.92
  4. Step 4: Simplify right side
    639.56x = 720,661.72
  5. Step 5: Solve for x
    x = 720,661.72/639.56
  6. Step 6: Final answer
    x = 1,126.80

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These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.