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Finding the Fourth Proportional to 209.55, 313.74 and 158.03

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Solution

The fourth proportional to 209.55, 313.74 and 158.03 is: 236.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.55 : 313.74 = 158.03 : x
  2. Step 2: Convert to fraction form
    209.55/313.74 = 158.03/x
  3. Step 3: Cross multiply
    209.55x = 313.74 × 158.03
  4. Step 4: Simplify right side
    209.55x = 49,581.12
  5. Step 5: Solve for x
    x = 49,581.12/209.55
  6. Step 6: Final answer
    x = 236.60

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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.