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Finding the Fourth Proportional to 408.00, 612.16 and 191.53

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Solution

The fourth proportional to 408.00, 612.16 and 191.53 is: 287.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.00 : 612.16 = 191.53 : x
  2. Step 2: Convert to fraction form
    408.00/612.16 = 191.53/x
  3. Step 3: Cross multiply
    408.00x = 612.16 × 191.53
  4. Step 4: Simplify right side
    408.00x = 117,247.29
  5. Step 5: Solve for x
    x = 117,247.29/408.00
  6. Step 6: Final answer
    x = 287.37

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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.