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Finding the Third Proportional to 442.88 and 661.69

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Solution

The third proportional to 442.88 and 661.69 is: 988.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.88 : 661.69 = 661.69 : x
  2. Step 2: Convert to fraction form
    442.88/661.69 = 661.69/x
  3. Step 3: Cross multiply
    442.88x = 661.69 × 661.69
  4. Step 4: Simplify right side
    442.88x = 437,830.35
  5. Step 5: Solve for x
    x = 437,830.35/442.88
  6. Step 6: Final answer
    x = 988.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.