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Finding the Third Proportional to 300.47 and 669.75

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Solution

The third proportional to 300.47 and 669.75 is: 1,492.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.47 : 669.75 = 669.75 : x
  2. Step 2: Convert to fraction form
    300.47/669.75 = 669.75/x
  3. Step 3: Cross multiply
    300.47x = 669.75 × 669.75
  4. Step 4: Simplify right side
    300.47x = 448,565.06
  5. Step 5: Solve for x
    x = 448,565.06/300.47
  6. Step 6: Final answer
    x = 1,492.88

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.