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Finding the Third Proportional to 553 and 629

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Solution

The third proportional to 553 and 629 is: 715.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    553 : 629 = 629 : x
  2. Step 2: Convert to fraction form
    553/629 = 629/x
  3. Step 3: Cross multiply
    553x = 629 × 629
  4. Step 4: Simplify right side
    553x = 395,641
  5. Step 5: Solve for x
    x = 395,641/553
  6. Step 6: Final answer
    x = 715.44

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.