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Finding the Third Proportional to 255 and 361

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Solution

The third proportional to 255 and 361 is: 511.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    255 : 361 = 361 : x
  2. Step 2: Convert to fraction form
    255/361 = 361/x
  3. Step 3: Cross multiply
    255x = 361 × 361
  4. Step 4: Simplify right side
    255x = 130,321
  5. Step 5: Solve for x
    x = 130,321/255
  6. Step 6: Final answer
    x = 511.06

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.