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Finding the Fourth Proportional to 209.50, 313.96 and 158.10

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Solution

The fourth proportional to 209.50, 313.96 and 158.10 is: 236.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.50 : 313.96 = 158.10 : x
  2. Step 2: Convert to fraction form
    209.50/313.96 = 158.10/x
  3. Step 3: Cross multiply
    209.50x = 313.96 × 158.10
  4. Step 4: Simplify right side
    209.50x = 49,634.72
  5. Step 5: Solve for x
    x = 49,634.72/209.50
  6. Step 6: Final answer
    x = 236.93

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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.