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Finding the Fourth Proportional to 846.92, 1,270.52 and 261.79

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Solution

The fourth proportional to 846.92, 1,270.52 and 261.79 is: 392.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.92 : 1,270.52 = 261.79 : x
  2. Step 2: Convert to fraction form
    846.92/1,270.52 = 261.79/x
  3. Step 3: Cross multiply
    846.92x = 1,270.52 × 261.79
  4. Step 4: Simplify right side
    846.92x = 332,608.22
  5. Step 5: Solve for x
    x = 332,608.22/846.92
  6. Step 6: Final answer
    x = 392.73

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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.