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Finding the Fourth Proportional to 553.80, 831 and 207.37

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Solution

The fourth proportional to 553.80, 831 and 207.37 is: 311.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.80 : 831 = 207.37 : x
  2. Step 2: Convert to fraction form
    553.80/831 = 207.37/x
  3. Step 3: Cross multiply
    553.80x = 831 × 207.37
  4. Step 4: Simplify right side
    553.80x = 172,324.47
  5. Step 5: Solve for x
    x = 172,324.47/553.80
  6. Step 6: Final answer
    x = 311.17

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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.