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Finding the Fourth Proportional to 280.43, 386.96 and 162.38

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Solution

The fourth proportional to 280.43, 386.96 and 162.38 is: 224.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.43 : 386.96 = 162.38 : x
  2. Step 2: Convert to fraction form
    280.43/386.96 = 162.38/x
  3. Step 3: Cross multiply
    280.43x = 386.96 × 162.38
  4. Step 4: Simplify right side
    280.43x = 62,831.82
  5. Step 5: Solve for x
    x = 62,831.82/280.43
  6. Step 6: Final answer
    x = 224.06

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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.