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Finding the Fourth Proportional to 471.76, 650.62 and 305.80

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Solution

The fourth proportional to 471.76, 650.62 and 305.80 is: 421.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.76 : 650.62 = 305.80 : x
  2. Step 2: Convert to fraction form
    471.76/650.62 = 305.80/x
  3. Step 3: Cross multiply
    471.76x = 650.62 × 305.80
  4. Step 4: Simplify right side
    471.76x = 198,959.60
  5. Step 5: Solve for x
    x = 198,959.60/471.76
  6. Step 6: Final answer
    x = 421.74

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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.