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Finding the Fourth Proportional to 408.07, 612.11 and 119.53

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Solution

The fourth proportional to 408.07, 612.11 and 119.53 is: 179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.07 : 612.11 = 119.53 : x
  2. Step 2: Convert to fraction form
    408.07/612.11 = 119.53/x
  3. Step 3: Cross multiply
    408.07x = 612.11 × 119.53
  4. Step 4: Simplify right side
    408.07x = 73,165.51
  5. Step 5: Solve for x
    x = 73,165.51/408.07
  6. Step 6: Final answer
    x = 179.30

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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.