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Finding the Fourth Proportional to 212.33, 317.84 and 135.38

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Solution

The fourth proportional to 212.33, 317.84 and 135.38 is: 202.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.33 : 317.84 = 135.38 : x
  2. Step 2: Convert to fraction form
    212.33/317.84 = 135.38/x
  3. Step 3: Cross multiply
    212.33x = 317.84 × 135.38
  4. Step 4: Simplify right side
    212.33x = 43,029.30
  5. Step 5: Solve for x
    x = 43,029.30/212.33
  6. Step 6: Final answer
    x = 202.65

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