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Finding the Fourth Proportional to 472.20, 650.88 and 316.68

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Solution

The fourth proportional to 472.20, 650.88 and 316.68 is: 436.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.20 : 650.88 = 316.68 : x
  2. Step 2: Convert to fraction form
    472.20/650.88 = 316.68/x
  3. Step 3: Cross multiply
    472.20x = 650.88 × 316.68
  4. Step 4: Simplify right side
    472.20x = 206,120.68
  5. Step 5: Solve for x
    x = 206,120.68/472.20
  6. Step 6: Final answer
    x = 436.51

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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.