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Finding the Fourth Proportional to 520.97, 720.02 and 396.63

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Solution

The fourth proportional to 520.97, 720.02 and 396.63 is: 548.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.97 : 720.02 = 396.63 : x
  2. Step 2: Convert to fraction form
    520.97/720.02 = 396.63/x
  3. Step 3: Cross multiply
    520.97x = 720.02 × 396.63
  4. Step 4: Simplify right side
    520.97x = 285,582.52
  5. Step 5: Solve for x
    x = 285,582.52/520.97
  6. Step 6: Final answer
    x = 548.18

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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.