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Finding the Fourth Proportional to 553.97, 764.91 and 344.45

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Solution

The fourth proportional to 553.97, 764.91 and 344.45 is: 475.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.97 : 764.91 = 344.45 : x
  2. Step 2: Convert to fraction form
    553.97/764.91 = 344.45/x
  3. Step 3: Cross multiply
    553.97x = 764.91 × 344.45
  4. Step 4: Simplify right side
    553.97x = 263,475.16
  5. Step 5: Solve for x
    x = 263,475.16/553.97
  6. Step 6: Final answer
    x = 475.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.