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Finding the Fourth Proportional to 386.45, 579.27 and 180.96

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Solution

The fourth proportional to 386.45, 579.27 and 180.96 is: 271.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.45 : 579.27 = 180.96 : x
  2. Step 2: Convert to fraction form
    386.45/579.27 = 180.96/x
  3. Step 3: Cross multiply
    386.45x = 579.27 × 180.96
  4. Step 4: Simplify right side
    386.45x = 104,824.70
  5. Step 5: Solve for x
    x = 104,824.70/386.45
  6. Step 6: Final answer
    x = 271.25

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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.