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Finding the Fourth Proportional to 523.24, 785.40 and 331

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Solution

The fourth proportional to 523.24, 785.40 and 331 is: 496.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.24 : 785.40 = 331 : x
  2. Step 2: Convert to fraction form
    523.24/785.40 = 331/x
  3. Step 3: Cross multiply
    523.24x = 785.40 × 331
  4. Step 4: Simplify right side
    523.24x = 259,967.40
  5. Step 5: Solve for x
    x = 259,967.40/523.24
  6. Step 6: Final answer
    x = 496.84

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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.