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Finding the Fourth Proportional to 420.30, 629.34 and 227.34

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Solution

The fourth proportional to 420.30, 629.34 and 227.34 is: 340.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.30 : 629.34 = 227.34 : x
  2. Step 2: Convert to fraction form
    420.30/629.34 = 227.34/x
  3. Step 3: Cross multiply
    420.30x = 629.34 × 227.34
  4. Step 4: Simplify right side
    420.30x = 143,074.16
  5. Step 5: Solve for x
    x = 143,074.16/420.30
  6. Step 6: Final answer
    x = 340.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.