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Finding the Third Proportional to 231.19 and 491.63

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Solution

The third proportional to 231.19 and 491.63 is: 1,045.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.19 : 491.63 = 491.63 : x
  2. Step 2: Convert to fraction form
    231.19/491.63 = 491.63/x
  3. Step 3: Cross multiply
    231.19x = 491.63 × 491.63
  4. Step 4: Simplify right side
    231.19x = 241,695.14
  5. Step 5: Solve for x
    x = 241,695.14/231.19
  6. Step 6: Final answer
    x = 1,045.45

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.