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Finding the Fourth Proportional to 561.75, 842.63 and 196.45

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Solution

The fourth proportional to 561.75, 842.63 and 196.45 is: 294.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.75 : 842.63 = 196.45 : x
  2. Step 2: Convert to fraction form
    561.75/842.63 = 196.45/x
  3. Step 3: Cross multiply
    561.75x = 842.63 × 196.45
  4. Step 4: Simplify right side
    561.75x = 165,534.73
  5. Step 5: Solve for x
    x = 165,534.73/561.75
  6. Step 6: Final answer
    x = 294.68

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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.