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Finding the Fourth Proportional to 717.81, 1,076.88 and 255.62

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Solution

The fourth proportional to 717.81, 1,076.88 and 255.62 is: 383.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.81 : 1,076.88 = 255.62 : x
  2. Step 2: Convert to fraction form
    717.81/1,076.88 = 255.62/x
  3. Step 3: Cross multiply
    717.81x = 1,076.88 × 255.62
  4. Step 4: Simplify right side
    717.81x = 275,266.68
  5. Step 5: Solve for x
    x = 275,266.68/717.81
  6. Step 6: Final answer
    x = 383.48

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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.