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Finding the Fourth Proportional to 561.86, 842.49 and 196.60

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Solution

The fourth proportional to 561.86, 842.49 and 196.60 is: 294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.86 : 842.49 = 196.60 : x
  2. Step 2: Convert to fraction form
    561.86/842.49 = 196.60/x
  3. Step 3: Cross multiply
    561.86x = 842.49 × 196.60
  4. Step 4: Simplify right side
    561.86x = 165,635.10
  5. Step 5: Solve for x
    x = 165,635.10/561.86
  6. Step 6: Final answer
    x = 294.80

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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.