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Finding the Fourth Proportional to 280.37, 386.91 and 169.82

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Solution

The fourth proportional to 280.37, 386.91 and 169.82 is: 234.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.37 : 386.91 = 169.82 : x
  2. Step 2: Convert to fraction form
    280.37/386.91 = 169.82/x
  3. Step 3: Cross multiply
    280.37x = 386.91 × 169.82
  4. Step 4: Simplify right side
    280.37x = 65,703.12
  5. Step 5: Solve for x
    x = 65,703.12/280.37
  6. Step 6: Final answer
    x = 234.35

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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.