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Finding the Third Proportional to 255 and 265.50

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Solution

The third proportional to 255 and 265.50 is: 276.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    255 : 265.50 = 265.50 : x
  2. Step 2: Convert to fraction form
    255/265.50 = 265.50/x
  3. Step 3: Cross multiply
    255x = 265.50 × 265.50
  4. Step 4: Simplify right side
    255x = 70,490.25
  5. Step 5: Solve for x
    x = 70,490.25/255
  6. Step 6: Final answer
    x = 276.43

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Why These Related Problems?

These problems maintain the same ratio (1.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.