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Finding the Fourth Proportional to 403.66, 557.02 and 228.98

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Solution

The fourth proportional to 403.66, 557.02 and 228.98 is: 315.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.66 : 557.02 = 228.98 : x
  2. Step 2: Convert to fraction form
    403.66/557.02 = 228.98/x
  3. Step 3: Cross multiply
    403.66x = 557.02 × 228.98
  4. Step 4: Simplify right side
    403.66x = 127,546.44
  5. Step 5: Solve for x
    x = 127,546.44/403.66
  6. Step 6: Final answer
    x = 315.97

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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.