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Finding the Third Proportional to 221.48 and 485.06

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Solution

The third proportional to 221.48 and 485.06 is: 1,062.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.48 : 485.06 = 485.06 : x
  2. Step 2: Convert to fraction form
    221.48/485.06 = 485.06/x
  3. Step 3: Cross multiply
    221.48x = 485.06 × 485.06
  4. Step 4: Simplify right side
    221.48x = 235,285.63
  5. Step 5: Solve for x
    x = 235,285.63/221.48
  6. Step 6: Final answer
    x = 1,062.31

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.