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Finding the Third Proportional to 277.25 and 342.50

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Solution

The third proportional to 277.25 and 342.50 is: 423.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.25 : 342.50 = 342.50 : x
  2. Step 2: Convert to fraction form
    277.25/342.50 = 342.50/x
  3. Step 3: Cross multiply
    277.25x = 342.50 × 342.50
  4. Step 4: Simplify right side
    277.25x = 117,306.25
  5. Step 5: Solve for x
    x = 117,306.25/277.25
  6. Step 6: Final answer
    x = 423.11

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Why These Related Problems?

These problems maintain the same ratio (1.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.