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Finding the Fourth Proportional to 290.55, 401.06 and 220.60

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Solution

The fourth proportional to 290.55, 401.06 and 220.60 is: 304.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.55 : 401.06 = 220.60 : x
  2. Step 2: Convert to fraction form
    290.55/401.06 = 220.60/x
  3. Step 3: Cross multiply
    290.55x = 401.06 × 220.60
  4. Step 4: Simplify right side
    290.55x = 88,474.07
  5. Step 5: Solve for x
    x = 88,474.07/290.55
  6. Step 6: Final answer
    x = 304.51

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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.