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Finding the Fourth Proportional to 386.08, 578.95 and 166.60

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Solution

The fourth proportional to 386.08, 578.95 and 166.60 is: 249.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.08 : 578.95 = 166.60 : x
  2. Step 2: Convert to fraction form
    386.08/578.95 = 166.60/x
  3. Step 3: Cross multiply
    386.08x = 578.95 × 166.60
  4. Step 4: Simplify right side
    386.08x = 96,453.89
  5. Step 5: Solve for x
    x = 96,453.89/386.08
  6. Step 6: Final answer
    x = 249.83

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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.