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Finding the Fourth Proportional to 523.16, 721.92 and 287.07

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Solution

The fourth proportional to 523.16, 721.92 and 287.07 is: 396.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.16 : 721.92 = 287.07 : x
  2. Step 2: Convert to fraction form
    523.16/721.92 = 287.07/x
  3. Step 3: Cross multiply
    523.16x = 721.92 × 287.07
  4. Step 4: Simplify right side
    523.16x = 207,241.57
  5. Step 5: Solve for x
    x = 207,241.57/523.16
  6. Step 6: Final answer
    x = 396.13

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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.