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Finding the Third Proportional to 485.44 and 730.69

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Solution

The third proportional to 485.44 and 730.69 is: 1,099.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.44 : 730.69 = 730.69 : x
  2. Step 2: Convert to fraction form
    485.44/730.69 = 730.69/x
  3. Step 3: Cross multiply
    485.44x = 730.69 × 730.69
  4. Step 4: Simplify right side
    485.44x = 533,904.22
  5. Step 5: Solve for x
    x = 533,904.22/485.44
  6. Step 6: Final answer
    x = 1,099.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.