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Finding the Fourth Proportional to 514.64, 773.12 and 445.48

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Solution

The fourth proportional to 514.64, 773.12 and 445.48 is: 669.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.64 : 773.12 = 445.48 : x
  2. Step 2: Convert to fraction form
    514.64/773.12 = 445.48/x
  3. Step 3: Cross multiply
    514.64x = 773.12 × 445.48
  4. Step 4: Simplify right side
    514.64x = 344,408.68
  5. Step 5: Solve for x
    x = 344,408.68/514.64
  6. Step 6: Final answer
    x = 669.22

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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.