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Finding the Third Proportional to 140.81 and 302.91

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Solution

The third proportional to 140.81 and 302.91 is: 651.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.81 : 302.91 = 302.91 : x
  2. Step 2: Convert to fraction form
    140.81/302.91 = 302.91/x
  3. Step 3: Cross multiply
    140.81x = 302.91 × 302.91
  4. Step 4: Simplify right side
    140.81x = 91,752.20
  5. Step 5: Solve for x
    x = 91,752.20/140.81
  6. Step 6: Final answer
    x = 651.59

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.