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Finding the Fourth Proportional to 318.94, 477.60 and 228.22

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Solution

The fourth proportional to 318.94, 477.60 and 228.22 is: 341.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.94 : 477.60 = 228.22 : x
  2. Step 2: Convert to fraction form
    318.94/477.60 = 228.22/x
  3. Step 3: Cross multiply
    318.94x = 477.60 × 228.22
  4. Step 4: Simplify right side
    318.94x = 108,997.87
  5. Step 5: Solve for x
    x = 108,997.87/318.94
  6. Step 6: Final answer
    x = 341.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.