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Finding the Fourth Proportional to 465.27, 642.09 and 258.27

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Solution

The fourth proportional to 465.27, 642.09 and 258.27 is: 356.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.27 : 642.09 = 258.27 : x
  2. Step 2: Convert to fraction form
    465.27/642.09 = 258.27/x
  3. Step 3: Cross multiply
    465.27x = 642.09 × 258.27
  4. Step 4: Simplify right side
    465.27x = 165,832.58
  5. Step 5: Solve for x
    x = 165,832.58/465.27
  6. Step 6: Final answer
    x = 356.42

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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.