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Finding the Fourth Proportional to 211.87, 317.23 and 134.41

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Solution

The fourth proportional to 211.87, 317.23 and 134.41 is: 201.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.87 : 317.23 = 134.41 : x
  2. Step 2: Convert to fraction form
    211.87/317.23 = 134.41/x
  3. Step 3: Cross multiply
    211.87x = 317.23 × 134.41
  4. Step 4: Simplify right side
    211.87x = 42,638.54
  5. Step 5: Solve for x
    x = 42,638.54/211.87
  6. Step 6: Final answer
    x = 201.25

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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.