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Finding the Fourth Proportional to 471.48, 650.42 and 305.74

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Solution

The fourth proportional to 471.48, 650.42 and 305.74 is: 421.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.48 : 650.42 = 305.74 : x
  2. Step 2: Convert to fraction form
    471.48/650.42 = 305.74/x
  3. Step 3: Cross multiply
    471.48x = 650.42 × 305.74
  4. Step 4: Simplify right side
    471.48x = 198,859.41
  5. Step 5: Solve for x
    x = 198,859.41/471.48
  6. Step 6: Final answer
    x = 421.78

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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.