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Finding the Third Proportional to 339.88 and 540.13

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Solution

The third proportional to 339.88 and 540.13 is: 858.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.88 : 540.13 = 540.13 : x
  2. Step 2: Convert to fraction form
    339.88/540.13 = 540.13/x
  3. Step 3: Cross multiply
    339.88x = 540.13 × 540.13
  4. Step 4: Simplify right side
    339.88x = 291,735.02
  5. Step 5: Solve for x
    x = 291,735.02/339.88
  6. Step 6: Final answer
    x = 858.36

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.