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Finding the Fourth Proportional to 290.79, 400.95 and 272.97

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Solution

The fourth proportional to 290.79, 400.95 and 272.97 is: 376.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.79 : 400.95 = 272.97 : x
  2. Step 2: Convert to fraction form
    290.79/400.95 = 272.97/x
  3. Step 3: Cross multiply
    290.79x = 400.95 × 272.97
  4. Step 4: Simplify right side
    290.79x = 109,447.32
  5. Step 5: Solve for x
    x = 109,447.32/290.79
  6. Step 6: Final answer
    x = 376.38

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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.