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Finding the Fourth Proportional to 403.58, 556.92 and 228.92

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Solution

The fourth proportional to 403.58, 556.92 and 228.92 is: 315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.58 : 556.92 = 228.92 : x
  2. Step 2: Convert to fraction form
    403.58/556.92 = 228.92/x
  3. Step 3: Cross multiply
    403.58x = 556.92 × 228.92
  4. Step 4: Simplify right side
    403.58x = 127,487.34
  5. Step 5: Solve for x
    x = 127,487.34/403.58
  6. Step 6: Final answer
    x = 315.90

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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.