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Finding the Fourth Proportional to 211.02, 316.32 and 113.43

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Solution

The fourth proportional to 211.02, 316.32 and 113.43 is: 170.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.02 : 316.32 = 113.43 : x
  2. Step 2: Convert to fraction form
    211.02/316.32 = 113.43/x
  3. Step 3: Cross multiply
    211.02x = 316.32 × 113.43
  4. Step 4: Simplify right side
    211.02x = 35,880.18
  5. Step 5: Solve for x
    x = 35,880.18/211.02
  6. Step 6: Final answer
    x = 170.03

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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.