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Finding the Fourth Proportional to 608.69, 913.17 and 197.81

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Solution

The fourth proportional to 608.69, 913.17 and 197.81 is: 296.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.69 : 913.17 = 197.81 : x
  2. Step 2: Convert to fraction form
    608.69/913.17 = 197.81/x
  3. Step 3: Cross multiply
    608.69x = 913.17 × 197.81
  4. Step 4: Simplify right side
    608.69x = 180,629.59
  5. Step 5: Solve for x
    x = 180,629.59/608.69
  6. Step 6: Final answer
    x = 296.75

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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.