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Finding the Fourth Proportional to 403.54, 556.90 and 228.88

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Solution

The fourth proportional to 403.54, 556.90 and 228.88 is: 315.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.54 : 556.90 = 228.88 : x
  2. Step 2: Convert to fraction form
    403.54/556.90 = 228.88/x
  3. Step 3: Cross multiply
    403.54x = 556.90 × 228.88
  4. Step 4: Simplify right side
    403.54x = 127,463.27
  5. Step 5: Solve for x
    x = 127,463.27/403.54
  6. Step 6: Final answer
    x = 315.86

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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.