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Finding the Fourth Proportional to 280.24, 386.55 and 169.51

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Solution

The fourth proportional to 280.24, 386.55 and 169.51 is: 233.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.24 : 386.55 = 169.51 : x
  2. Step 2: Convert to fraction form
    280.24/386.55 = 169.51/x
  3. Step 3: Cross multiply
    280.24x = 386.55 × 169.51
  4. Step 4: Simplify right side
    280.24x = 65,524.09
  5. Step 5: Solve for x
    x = 65,524.09/280.24
  6. Step 6: Final answer
    x = 233.81

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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.