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Finding the Fourth Proportional to 471.07, 649.83 and 274.42

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Solution

The fourth proportional to 471.07, 649.83 and 274.42 is: 378.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.07 : 649.83 = 274.42 : x
  2. Step 2: Convert to fraction form
    471.07/649.83 = 274.42/x
  3. Step 3: Cross multiply
    471.07x = 649.83 × 274.42
  4. Step 4: Simplify right side
    471.07x = 178,326.35
  5. Step 5: Solve for x
    x = 178,326.35/471.07
  6. Step 6: Final answer
    x = 378.56

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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.