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Finding the Fourth Proportional to 395.64, 546.05 and 238.41

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Solution

The fourth proportional to 395.64, 546.05 and 238.41 is: 329.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.64 : 546.05 = 238.41 : x
  2. Step 2: Convert to fraction form
    395.64/546.05 = 238.41/x
  3. Step 3: Cross multiply
    395.64x = 546.05 × 238.41
  4. Step 4: Simplify right side
    395.64x = 130,184.38
  5. Step 5: Solve for x
    x = 130,184.38/395.64
  6. Step 6: Final answer
    x = 329.05

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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.