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Finding the Third Proportional to 331.69 and 623.06

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Solution

The third proportional to 331.69 and 623.06 is: 1,170.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.69 : 623.06 = 623.06 : x
  2. Step 2: Convert to fraction form
    331.69/623.06 = 623.06/x
  3. Step 3: Cross multiply
    331.69x = 623.06 × 623.06
  4. Step 4: Simplify right side
    331.69x = 388,206.88
  5. Step 5: Solve for x
    x = 388,206.88/331.69
  6. Step 6: Final answer
    x = 1,170.40

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.