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Finding the Fourth Proportional to 290.12, 435.90 and 194.56

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Solution

The fourth proportional to 290.12, 435.90 and 194.56 is: 292.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.12 : 435.90 = 194.56 : x
  2. Step 2: Convert to fraction form
    290.12/435.90 = 194.56/x
  3. Step 3: Cross multiply
    290.12x = 435.90 × 194.56
  4. Step 4: Simplify right side
    290.12x = 84,808.70
  5. Step 5: Solve for x
    x = 84,808.70/290.12
  6. Step 6: Final answer
    x = 292.32

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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.