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Finding the Fourth Proportional to 386.08, 531.92 and 369.44

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Solution

The fourth proportional to 386.08, 531.92 and 369.44 is: 508.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.08 : 531.92 = 369.44 : x
  2. Step 2: Convert to fraction form
    386.08/531.92 = 369.44/x
  3. Step 3: Cross multiply
    386.08x = 531.92 × 369.44
  4. Step 4: Simplify right side
    386.08x = 196,512.52
  5. Step 5: Solve for x
    x = 196,512.52/386.08
  6. Step 6: Final answer
    x = 508.99

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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.