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Finding the Fourth Proportional to 291.98, 438.25 and 194.22

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Solution

The fourth proportional to 291.98, 438.25 and 194.22 is: 291.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.98 : 438.25 = 194.22 : x
  2. Step 2: Convert to fraction form
    291.98/438.25 = 194.22/x
  3. Step 3: Cross multiply
    291.98x = 438.25 × 194.22
  4. Step 4: Simplify right side
    291.98x = 85,116.92
  5. Step 5: Solve for x
    x = 85,116.92/291.98
  6. Step 6: Final answer
    x = 291.52

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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.