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Finding the Fourth Proportional to 408.46, 612.84 and 189.19

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Solution

The fourth proportional to 408.46, 612.84 and 189.19 is: 283.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.46 : 612.84 = 189.19 : x
  2. Step 2: Convert to fraction form
    408.46/612.84 = 189.19/x
  3. Step 3: Cross multiply
    408.46x = 612.84 × 189.19
  4. Step 4: Simplify right side
    408.46x = 115,941.19
  5. Step 5: Solve for x
    x = 115,941.19/408.46
  6. Step 6: Final answer
    x = 283.85

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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.