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Finding the Third Proportional to 457.31 and 644.63

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Solution

The third proportional to 457.31 and 644.63 is: 908.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.31 : 644.63 = 644.63 : x
  2. Step 2: Convert to fraction form
    457.31/644.63 = 644.63/x
  3. Step 3: Cross multiply
    457.31x = 644.63 × 644.63
  4. Step 4: Simplify right side
    457.31x = 415,541.39
  5. Step 5: Solve for x
    x = 415,541.39/457.31
  6. Step 6: Final answer
    x = 908.66

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.