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Finding the Third Proportional to 345.99 and 720.81

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Solution

The third proportional to 345.99 and 720.81 is: 1,501.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.99 : 720.81 = 720.81 : x
  2. Step 2: Convert to fraction form
    345.99/720.81 = 720.81/x
  3. Step 3: Cross multiply
    345.99x = 720.81 × 720.81
  4. Step 4: Simplify right side
    345.99x = 519,571.36
  5. Step 5: Solve for x
    x = 519,571.36/345.99
  6. Step 6: Final answer
    x = 1,501.69

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.