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Finding the Fourth Proportional to 397.25, 548.48 and 242.27

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Solution

The fourth proportional to 397.25, 548.48 and 242.27 is: 334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.25 : 548.48 = 242.27 : x
  2. Step 2: Convert to fraction form
    397.25/548.48 = 242.27/x
  3. Step 3: Cross multiply
    397.25x = 548.48 × 242.27
  4. Step 4: Simplify right side
    397.25x = 132,880.25
  5. Step 5: Solve for x
    x = 132,880.25/397.25
  6. Step 6: Final answer
    x = 334.50

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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.