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Finding the Fourth Proportional to 279.93, 386.37 and 161.99

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Solution

The fourth proportional to 279.93, 386.37 and 161.99 is: 223.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.93 : 386.37 = 161.99 : x
  2. Step 2: Convert to fraction form
    279.93/386.37 = 161.99/x
  3. Step 3: Cross multiply
    279.93x = 386.37 × 161.99
  4. Step 4: Simplify right side
    279.93x = 62,585.33
  5. Step 5: Solve for x
    x = 62,585.33/279.93
  6. Step 6: Final answer
    x = 223.57

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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.