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Finding the Fourth Proportional to 514.92, 771.18 and 447

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Solution

The fourth proportional to 514.92, 771.18 and 447 is: 669.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.92 : 771.18 = 447 : x
  2. Step 2: Convert to fraction form
    514.92/771.18 = 447/x
  3. Step 3: Cross multiply
    514.92x = 771.18 × 447
  4. Step 4: Simplify right side
    514.92x = 344,717.46
  5. Step 5: Solve for x
    x = 344,717.46/514.92
  6. Step 6: Final answer
    x = 669.46

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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.