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Finding the Fourth Proportional to 521.97, 720.38 and 297.96

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Solution

The fourth proportional to 521.97, 720.38 and 297.96 is: 411.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.97 : 720.38 = 297.96 : x
  2. Step 2: Convert to fraction form
    521.97/720.38 = 297.96/x
  3. Step 3: Cross multiply
    521.97x = 720.38 × 297.96
  4. Step 4: Simplify right side
    521.97x = 214,644.42
  5. Step 5: Solve for x
    x = 214,644.42/521.97
  6. Step 6: Final answer
    x = 411.22

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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.