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Finding the Fourth Proportional to 553.27, 764.19 and 403.66

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Solution

The fourth proportional to 553.27, 764.19 and 403.66 is: 557.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.27 : 764.19 = 403.66 : x
  2. Step 2: Convert to fraction form
    553.27/764.19 = 403.66/x
  3. Step 3: Cross multiply
    553.27x = 764.19 × 403.66
  4. Step 4: Simplify right side
    553.27x = 308,470.92
  5. Step 5: Solve for x
    x = 308,470.92/553.27
  6. Step 6: Final answer
    x = 557.54

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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.