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Finding the Fourth Proportional to 395.84, 546.26 and 221.19

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Solution

The fourth proportional to 395.84, 546.26 and 221.19 is: 305.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.84 : 546.26 = 221.19 : x
  2. Step 2: Convert to fraction form
    395.84/546.26 = 221.19/x
  3. Step 3: Cross multiply
    395.84x = 546.26 × 221.19
  4. Step 4: Simplify right side
    395.84x = 120,827.25
  5. Step 5: Solve for x
    x = 120,827.25/395.84
  6. Step 6: Final answer
    x = 305.24

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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.