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Finding the Fourth Proportional to 472.27, 651.30 and 306.31

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Solution

The fourth proportional to 472.27, 651.30 and 306.31 is: 422.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.27 : 651.30 = 306.31 : x
  2. Step 2: Convert to fraction form
    472.27/651.30 = 306.31/x
  3. Step 3: Cross multiply
    472.27x = 651.30 × 306.31
  4. Step 4: Simplify right side
    472.27x = 199,499.70
  5. Step 5: Solve for x
    x = 199,499.70/472.27
  6. Step 6: Final answer
    x = 422.43

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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.