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Finding the Fourth Proportional to 465.76, 642.75 and 255.94

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Solution

The fourth proportional to 465.76, 642.75 and 255.94 is: 353.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.76 : 642.75 = 255.94 : x
  2. Step 2: Convert to fraction form
    465.76/642.75 = 255.94/x
  3. Step 3: Cross multiply
    465.76x = 642.75 × 255.94
  4. Step 4: Simplify right side
    465.76x = 164,505.44
  5. Step 5: Solve for x
    x = 164,505.44/465.76
  6. Step 6: Final answer
    x = 353.20

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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.