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Finding the Fourth Proportional to 280.44, 386.93 and 169.89

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Solution

The fourth proportional to 280.44, 386.93 and 169.89 is: 234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.44 : 386.93 = 169.89 : x
  2. Step 2: Convert to fraction form
    280.44/386.93 = 169.89/x
  3. Step 3: Cross multiply
    280.44x = 386.93 × 169.89
  4. Step 4: Simplify right side
    280.44x = 65,734.64
  5. Step 5: Solve for x
    x = 65,734.64/280.44
  6. Step 6: Final answer
    x = 234.40

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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.