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Finding the Fourth Proportional to 280.10, 386.43 and 169.54

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Solution

The fourth proportional to 280.10, 386.43 and 169.54 is: 233.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.10 : 386.43 = 169.54 : x
  2. Step 2: Convert to fraction form
    280.10/386.43 = 169.54/x
  3. Step 3: Cross multiply
    280.10x = 386.43 × 169.54
  4. Step 4: Simplify right side
    280.10x = 65,514.38
  5. Step 5: Solve for x
    x = 65,514.38/280.10
  6. Step 6: Final answer
    x = 233.89

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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.