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Finding the Fourth Proportional to 471.05, 649.99 and 274.60

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Solution

The fourth proportional to 471.05, 649.99 and 274.60 is: 378.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.05 : 649.99 = 274.60 : x
  2. Step 2: Convert to fraction form
    471.05/649.99 = 274.60/x
  3. Step 3: Cross multiply
    471.05x = 649.99 × 274.60
  4. Step 4: Simplify right side
    471.05x = 178,487.25
  5. Step 5: Solve for x
    x = 178,487.25/471.05
  6. Step 6: Final answer
    x = 378.91

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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.