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Finding the Third Proportional to 393.19 and 730.69

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Solution

The third proportional to 393.19 and 730.69 is: 1,357.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.19 : 730.69 = 730.69 : x
  2. Step 2: Convert to fraction form
    393.19/730.69 = 730.69/x
  3. Step 3: Cross multiply
    393.19x = 730.69 × 730.69
  4. Step 4: Simplify right side
    393.19x = 533,904.22
  5. Step 5: Solve for x
    x = 533,904.22/393.19
  6. Step 6: Final answer
    x = 1,357.89

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Why These Related Problems?

These problems maintain the same ratio (1.86) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.