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Finding the Fourth Proportional to 553.86, 831 and 169.14

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Solution

The fourth proportional to 553.86, 831 and 169.14 is: 253.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.86 : 831 = 169.14 : x
  2. Step 2: Convert to fraction form
    553.86/831 = 169.14/x
  3. Step 3: Cross multiply
    553.86x = 831 × 169.14
  4. Step 4: Simplify right side
    553.86x = 140,555.34
  5. Step 5: Solve for x
    x = 140,555.34/553.86
  6. Step 6: Final answer
    x = 253.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.