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Finding the Fourth Proportional to 374.85, 561.83 and 191.86

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Solution

The fourth proportional to 374.85, 561.83 and 191.86 is: 287.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.85 : 561.83 = 191.86 : x
  2. Step 2: Convert to fraction form
    374.85/561.83 = 191.86/x
  3. Step 3: Cross multiply
    374.85x = 561.83 × 191.86
  4. Step 4: Simplify right side
    374.85x = 107,790.34
  5. Step 5: Solve for x
    x = 107,790.34/374.85
  6. Step 6: Final answer
    x = 287.56

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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.