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Finding the Fourth Proportional to 386.06, 532.21 and 238.62

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Solution

The fourth proportional to 386.06, 532.21 and 238.62 is: 328.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.06 : 532.21 = 238.62 : x
  2. Step 2: Convert to fraction form
    386.06/532.21 = 238.62/x
  3. Step 3: Cross multiply
    386.06x = 532.21 × 238.62
  4. Step 4: Simplify right side
    386.06x = 126,995.95
  5. Step 5: Solve for x
    x = 126,995.95/386.06
  6. Step 6: Final answer
    x = 328.95

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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.