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Finding the Fourth Proportional to 400.98, 553.35 and 226.38

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Solution

The fourth proportional to 400.98, 553.35 and 226.38 is: 312.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.98 : 553.35 = 226.38 : x
  2. Step 2: Convert to fraction form
    400.98/553.35 = 226.38/x
  3. Step 3: Cross multiply
    400.98x = 553.35 × 226.38
  4. Step 4: Simplify right side
    400.98x = 125,267.37
  5. Step 5: Solve for x
    x = 125,267.37/400.98
  6. Step 6: Final answer
    x = 312.40

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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.