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Finding the Third Proportional to 353.75 and 770.50

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Solution

The third proportional to 353.75 and 770.50 is: 1,678.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.75 : 770.50 = 770.50 : x
  2. Step 2: Convert to fraction form
    353.75/770.50 = 770.50/x
  3. Step 3: Cross multiply
    353.75x = 770.50 × 770.50
  4. Step 4: Simplify right side
    353.75x = 593,670.25
  5. Step 5: Solve for x
    x = 593,670.25/353.75
  6. Step 6: Final answer
    x = 1,678.22

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.