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Finding the Fourth Proportional to 212.43, 317.99 and 194.49

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Solution

The fourth proportional to 212.43, 317.99 and 194.49 is: 291.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.43 : 317.99 = 194.49 : x
  2. Step 2: Convert to fraction form
    212.43/317.99 = 194.49/x
  3. Step 3: Cross multiply
    212.43x = 317.99 × 194.49
  4. Step 4: Simplify right side
    212.43x = 61,845.88
  5. Step 5: Solve for x
    x = 61,845.88/212.43
  6. Step 6: Final answer
    x = 291.14

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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.