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Finding the Fourth Proportional to 212.67, 317.83 and 157.95

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Solution

The fourth proportional to 212.67, 317.83 and 157.95 is: 236.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.67 : 317.83 = 157.95 : x
  2. Step 2: Convert to fraction form
    212.67/317.83 = 157.95/x
  3. Step 3: Cross multiply
    212.67x = 317.83 × 157.95
  4. Step 4: Simplify right side
    212.67x = 50,201.25
  5. Step 5: Solve for x
    x = 50,201.25/212.67
  6. Step 6: Final answer
    x = 236.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.