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Finding the Fourth Proportional to 386.36, 579.38 and 170.08

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Solution

The fourth proportional to 386.36, 579.38 and 170.08 is: 255.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.36 : 579.38 = 170.08 : x
  2. Step 2: Convert to fraction form
    386.36/579.38 = 170.08/x
  3. Step 3: Cross multiply
    386.36x = 579.38 × 170.08
  4. Step 4: Simplify right side
    386.36x = 98,540.95
  5. Step 5: Solve for x
    x = 98,540.95/386.36
  6. Step 6: Final answer
    x = 255.05

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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.