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Finding the Third Proportional to 388.13 and 722.25

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Solution

The third proportional to 388.13 and 722.25 is: 1,344.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.13 : 722.25 = 722.25 : x
  2. Step 2: Convert to fraction form
    388.13/722.25 = 722.25/x
  3. Step 3: Cross multiply
    388.13x = 722.25 × 722.25
  4. Step 4: Simplify right side
    388.13x = 521,645.06
  5. Step 5: Solve for x
    x = 521,645.06/388.13
  6. Step 6: Final answer
    x = 1,344.01

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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.