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Finding the Fourth Proportional to 514.28, 709.94 and 396.22

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Solution

The fourth proportional to 514.28, 709.94 and 396.22 is: 546.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.28 : 709.94 = 396.22 : x
  2. Step 2: Convert to fraction form
    514.28/709.94 = 396.22/x
  3. Step 3: Cross multiply
    514.28x = 709.94 × 396.22
  4. Step 4: Simplify right side
    514.28x = 281,291.64
  5. Step 5: Solve for x
    x = 281,291.64/514.28
  6. Step 6: Final answer
    x = 546.96

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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.