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Finding the Third Proportional to 392.58 and 577.97

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Solution

The third proportional to 392.58 and 577.97 is: 850.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.58 : 577.97 = 577.97 : x
  2. Step 2: Convert to fraction form
    392.58/577.97 = 577.97/x
  3. Step 3: Cross multiply
    392.58x = 577.97 × 577.97
  4. Step 4: Simplify right side
    392.58x = 334,047.88
  5. Step 5: Solve for x
    x = 334,047.88/392.58
  6. Step 6: Final answer
    x = 850.91

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.