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Finding the Third Proportional to 661.78 and 714.94

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Solution

The third proportional to 661.78 and 714.94 is: 772.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.78 : 714.94 = 714.94 : x
  2. Step 2: Convert to fraction form
    661.78/714.94 = 714.94/x
  3. Step 3: Cross multiply
    661.78x = 714.94 × 714.94
  4. Step 4: Simplify right side
    661.78x = 511,135.63
  5. Step 5: Solve for x
    x = 511,135.63/661.78
  6. Step 6: Final answer
    x = 772.36

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These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.