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Finding the Fourth Proportional to 400.95, 553.31 and 223.91

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Solution

The fourth proportional to 400.95, 553.31 and 223.91 is: 308.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.95 : 553.31 = 223.91 : x
  2. Step 2: Convert to fraction form
    400.95/553.31 = 223.91/x
  3. Step 3: Cross multiply
    400.95x = 553.31 × 223.91
  4. Step 4: Simplify right side
    400.95x = 123,887.76
  5. Step 5: Solve for x
    x = 123,887.76/400.95
  6. Step 6: Final answer
    x = 308.99

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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.