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Finding the Fourth Proportional to 397.30, 547.98 and 272.74

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Solution

The fourth proportional to 397.30, 547.98 and 272.74 is: 376.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.30 : 547.98 = 272.74 : x
  2. Step 2: Convert to fraction form
    397.30/547.98 = 272.74/x
  3. Step 3: Cross multiply
    397.30x = 547.98 × 272.74
  4. Step 4: Simplify right side
    397.30x = 149,456.07
  5. Step 5: Solve for x
    x = 149,456.07/397.30
  6. Step 6: Final answer
    x = 376.18

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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.