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Finding the Fourth Proportional to 561.81, 842.94 and 196.86

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Solution

The fourth proportional to 561.81, 842.94 and 196.86 is: 295.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.81 : 842.94 = 196.86 : x
  2. Step 2: Convert to fraction form
    561.81/842.94 = 196.86/x
  3. Step 3: Cross multiply
    561.81x = 842.94 × 196.86
  4. Step 4: Simplify right side
    561.81x = 165,941.17
  5. Step 5: Solve for x
    x = 165,941.17/561.81
  6. Step 6: Final answer
    x = 295.37

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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.