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Finding the Fourth Proportional to 471.34, 650.32 and 305.65

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Solution

The fourth proportional to 471.34, 650.32 and 305.65 is: 421.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.34 : 650.32 = 305.65 : x
  2. Step 2: Convert to fraction form
    471.34/650.32 = 305.65/x
  3. Step 3: Cross multiply
    471.34x = 650.32 × 305.65
  4. Step 4: Simplify right side
    471.34x = 198,770.31
  5. Step 5: Solve for x
    x = 198,770.31/471.34
  6. Step 6: Final answer
    x = 421.71

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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.