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Finding the Fourth Proportional to 209.04, 315.18 and 195.12

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Solution

The fourth proportional to 209.04, 315.18 and 195.12 is: 294.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.04 : 315.18 = 195.12 : x
  2. Step 2: Convert to fraction form
    209.04/315.18 = 195.12/x
  3. Step 3: Cross multiply
    209.04x = 315.18 × 195.12
  4. Step 4: Simplify right side
    209.04x = 61,497.92
  5. Step 5: Solve for x
    x = 61,497.92/209.04
  6. Step 6: Final answer
    x = 294.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.