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Finding the Third Proportional to 640.41 and 1,031.48

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Solution

The third proportional to 640.41 and 1,031.48 is: 1,661.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.41 : 1,031.48 = 1,031.48 : x
  2. Step 2: Convert to fraction form
    640.41/1,031.48 = 1,031.48/x
  3. Step 3: Cross multiply
    640.41x = 1,031.48 × 1,031.48
  4. Step 4: Simplify right side
    640.41x = 1,063,960.02
  5. Step 5: Solve for x
    x = 1,063,960.02/640.41
  6. Step 6: Final answer
    x = 1,661.38

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.