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Finding the Fourth Proportional to 553.41, 764.13 and 343.80

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Solution

The fourth proportional to 553.41, 764.13 and 343.80 is: 474.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.41 : 764.13 = 343.80 : x
  2. Step 2: Convert to fraction form
    553.41/764.13 = 343.80/x
  3. Step 3: Cross multiply
    553.41x = 764.13 × 343.80
  4. Step 4: Simplify right side
    553.41x = 262,707.89
  5. Step 5: Solve for x
    x = 262,707.89/553.41
  6. Step 6: Final answer
    x = 474.71

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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.