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Finding the Fourth Proportional to 403.90, 557.42 and 226.89

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Solution

The fourth proportional to 403.90, 557.42 and 226.89 is: 313.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.90 : 557.42 = 226.89 : x
  2. Step 2: Convert to fraction form
    403.90/557.42 = 226.89/x
  3. Step 3: Cross multiply
    403.90x = 557.42 × 226.89
  4. Step 4: Simplify right side
    403.90x = 126,473.02
  5. Step 5: Solve for x
    x = 126,473.02/403.90
  6. Step 6: Final answer
    x = 313.13

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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.