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Finding the Fourth Proportional to 318.87, 477.90 and 203.27

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Solution

The fourth proportional to 318.87, 477.90 and 203.27 is: 304.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.87 : 477.90 = 203.27 : x
  2. Step 2: Convert to fraction form
    318.87/477.90 = 203.27/x
  3. Step 3: Cross multiply
    318.87x = 477.90 × 203.27
  4. Step 4: Simplify right side
    318.87x = 97,143.93
  5. Step 5: Solve for x
    x = 97,143.93/318.87
  6. Step 6: Final answer
    x = 304.65

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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.