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Finding the Fourth Proportional to 386.85, 579.81 and 169.98

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Solution

The fourth proportional to 386.85, 579.81 and 169.98 is: 254.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.85 : 579.81 = 169.98 : x
  2. Step 2: Convert to fraction form
    386.85/579.81 = 169.98/x
  3. Step 3: Cross multiply
    386.85x = 579.81 × 169.98
  4. Step 4: Simplify right side
    386.85x = 98,556.10
  5. Step 5: Solve for x
    x = 98,556.10/386.85
  6. Step 6: Final answer
    x = 254.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.