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Finding the Fourth Proportional to 280.54, 386.95 and 169.92

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Solution

The fourth proportional to 280.54, 386.95 and 169.92 is: 234.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.54 : 386.95 = 169.92 : x
  2. Step 2: Convert to fraction form
    280.54/386.95 = 169.92/x
  3. Step 3: Cross multiply
    280.54x = 386.95 × 169.92
  4. Step 4: Simplify right side
    280.54x = 65,750.12
  5. Step 5: Solve for x
    x = 65,750.12/280.54
  6. Step 6: Final answer
    x = 234.37

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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.