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Finding the Fourth Proportional to 212.90, 318.86 and 110.27

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Solution

The fourth proportional to 212.90, 318.86 and 110.27 is: 165.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.90 : 318.86 = 110.27 : x
  2. Step 2: Convert to fraction form
    212.90/318.86 = 110.27/x
  3. Step 3: Cross multiply
    212.90x = 318.86 × 110.27
  4. Step 4: Simplify right side
    212.90x = 35,158.55
  5. Step 5: Solve for x
    x = 35,158.55/212.90
  6. Step 6: Final answer
    x = 165.15

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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.