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Finding the Fourth Proportional to 290.25, 435.11 and 136.22

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Solution

The fourth proportional to 290.25, 435.11 and 136.22 is: 204.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.25 : 435.11 = 136.22 : x
  2. Step 2: Convert to fraction form
    290.25/435.11 = 136.22/x
  3. Step 3: Cross multiply
    290.25x = 435.11 × 136.22
  4. Step 4: Simplify right side
    290.25x = 59,267.83
  5. Step 5: Solve for x
    x = 59,267.83/290.25
  6. Step 6: Final answer
    x = 204.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.