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Finding the Fourth Proportional to 290.69, 401.05 and 180.12

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Solution

The fourth proportional to 290.69, 401.05 and 180.12 is: 248.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.69 : 401.05 = 180.12 : x
  2. Step 2: Convert to fraction form
    290.69/401.05 = 180.12/x
  3. Step 3: Cross multiply
    290.69x = 401.05 × 180.12
  4. Step 4: Simplify right side
    290.69x = 72,238.86
  5. Step 5: Solve for x
    x = 72,238.86/290.69
  6. Step 6: Final answer
    x = 248.51

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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.