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Finding the Third Proportional to 345.75 and 539.75

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Solution

The third proportional to 345.75 and 539.75 is: 842.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.75 : 539.75 = 539.75 : x
  2. Step 2: Convert to fraction form
    345.75/539.75 = 539.75/x
  3. Step 3: Cross multiply
    345.75x = 539.75 × 539.75
  4. Step 4: Simplify right side
    345.75x = 291,330.06
  5. Step 5: Solve for x
    x = 291,330.06/345.75
  6. Step 6: Final answer
    x = 842.60

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.