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Finding the Third Proportional to 255.75 and 551.63

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Solution

The third proportional to 255.75 and 551.63 is: 1,189.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.75 : 551.63 = 551.63 : x
  2. Step 2: Convert to fraction form
    255.75/551.63 = 551.63/x
  3. Step 3: Cross multiply
    255.75x = 551.63 × 551.63
  4. Step 4: Simplify right side
    255.75x = 304,290.14
  5. Step 5: Solve for x
    x = 304,290.14/255.75
  6. Step 6: Final answer
    x = 1,189.80

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.