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Finding the Fourth Proportional to 523.73, 722.74 and 287.67

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Solution

The fourth proportional to 523.73, 722.74 and 287.67 is: 396.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.73 : 722.74 = 287.67 : x
  2. Step 2: Convert to fraction form
    523.73/722.74 = 287.67/x
  3. Step 3: Cross multiply
    523.73x = 722.74 × 287.67
  4. Step 4: Simplify right side
    523.73x = 207,910.62
  5. Step 5: Solve for x
    x = 207,910.62/523.73
  6. Step 6: Final answer
    x = 396.98

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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.