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Finding the Third Proportional to 274.92 and 429.05

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Solution

The third proportional to 274.92 and 429.05 is: 669.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.92 : 429.05 = 429.05 : x
  2. Step 2: Convert to fraction form
    274.92/429.05 = 429.05/x
  3. Step 3: Cross multiply
    274.92x = 429.05 × 429.05
  4. Step 4: Simplify right side
    274.92x = 184,081.22
  5. Step 5: Solve for x
    x = 184,081.22/274.92
  6. Step 6: Final answer
    x = 669.58

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.