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Finding the Fourth Proportional to 290.86, 401.45 and 180.39

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Solution

The fourth proportional to 290.86, 401.45 and 180.39 is: 248.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.86 : 401.45 = 180.39 : x
  2. Step 2: Convert to fraction form
    290.86/401.45 = 180.39/x
  3. Step 3: Cross multiply
    290.86x = 401.45 × 180.39
  4. Step 4: Simplify right side
    290.86x = 72,417.57
  5. Step 5: Solve for x
    x = 72,417.57/290.86
  6. Step 6: Final answer
    x = 248.98

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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.