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Finding the Fourth Proportional to 717.52, 1,076.54 and 255.36

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Solution

The fourth proportional to 717.52, 1,076.54 and 255.36 is: 383.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.52 : 1,076.54 = 255.36 : x
  2. Step 2: Convert to fraction form
    717.52/1,076.54 = 255.36/x
  3. Step 3: Cross multiply
    717.52x = 1,076.54 × 255.36
  4. Step 4: Simplify right side
    717.52x = 274,905.25
  5. Step 5: Solve for x
    x = 274,905.25/717.52
  6. Step 6: Final answer
    x = 383.13

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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.