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Finding the Third Proportional to 166.13 and 436.31

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Solution

The third proportional to 166.13 and 436.31 is: 1,145.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.13 : 436.31 = 436.31 : x
  2. Step 2: Convert to fraction form
    166.13/436.31 = 436.31/x
  3. Step 3: Cross multiply
    166.13x = 436.31 × 436.31
  4. Step 4: Simplify right side
    166.13x = 190,368.60
  5. Step 5: Solve for x
    x = 190,368.60/166.13
  6. Step 6: Final answer
    x = 1,145.94

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Why These Related Problems?

These problems maintain the same ratio (2.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.