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Finding the Third Proportional to 351.69 and 740.39

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Solution

The third proportional to 351.69 and 740.39 is: 1,558.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.69 : 740.39 = 740.39 : x
  2. Step 2: Convert to fraction form
    351.69/740.39 = 740.39/x
  3. Step 3: Cross multiply
    351.69x = 740.39 × 740.39
  4. Step 4: Simplify right side
    351.69x = 548,178.28
  5. Step 5: Solve for x
    x = 548,178.28/351.69
  6. Step 6: Final answer
    x = 1,558.72

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.