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Finding the Fourth Proportional to 290.99, 403.38 and 272.36

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Solution

The fourth proportional to 290.99, 403.38 and 272.36 is: 377.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.99 : 403.38 = 272.36 : x
  2. Step 2: Convert to fraction form
    290.99/403.38 = 272.36/x
  3. Step 3: Cross multiply
    290.99x = 403.38 × 272.36
  4. Step 4: Simplify right side
    290.99x = 109,865.59
  5. Step 5: Solve for x
    x = 109,865.59/290.99
  6. Step 6: Final answer
    x = 377.55

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.