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Finding the Fourth Proportional to 209.23, 313.63 and 197.08

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Solution

The fourth proportional to 209.23, 313.63 and 197.08 is: 295.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.23 : 313.63 = 197.08 : x
  2. Step 2: Convert to fraction form
    209.23/313.63 = 197.08/x
  3. Step 3: Cross multiply
    209.23x = 313.63 × 197.08
  4. Step 4: Simplify right side
    209.23x = 61,810.20
  5. Step 5: Solve for x
    x = 61,810.20/209.23
  6. Step 6: Final answer
    x = 295.42

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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.