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Finding the Fourth Proportional to 521.82, 720.33 and 325.43

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Solution

The fourth proportional to 521.82, 720.33 and 325.43 is: 449.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.82 : 720.33 = 325.43 : x
  2. Step 2: Convert to fraction form
    521.82/720.33 = 325.43/x
  3. Step 3: Cross multiply
    521.82x = 720.33 × 325.43
  4. Step 4: Simplify right side
    521.82x = 234,411.76
  5. Step 5: Solve for x
    x = 234,411.76/521.82
  6. Step 6: Final answer
    x = 449.22

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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.