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Finding the Fourth Proportional to 553.11, 818.09 and 553.11

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Solution

The fourth proportional to 553.11, 818.09 and 553.11 is: 818.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.11 : 818.09 = 553.11 : x
  2. Step 2: Convert to fraction form
    553.11/818.09 = 553.11/x
  3. Step 3: Cross multiply
    553.11x = 818.09 × 553.11
  4. Step 4: Simplify right side
    553.11x = 452,490.99
  5. Step 5: Solve for x
    x = 452,490.99/553.11
  6. Step 6: Final answer
    x = 818.09

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.