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Finding the Fourth Proportional to 561.63, 842.45 and 196.43

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Solution

The fourth proportional to 561.63, 842.45 and 196.43 is: 294.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.63 : 842.45 = 196.43 : x
  2. Step 2: Convert to fraction form
    561.63/842.45 = 196.43/x
  3. Step 3: Cross multiply
    561.63x = 842.45 × 196.43
  4. Step 4: Simplify right side
    561.63x = 165,479.94
  5. Step 5: Solve for x
    x = 165,479.94/561.63
  6. Step 6: Final answer
    x = 294.64

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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.