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Finding the Fourth Proportional to 408.04, 612.15 and 119.50

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Solution

The fourth proportional to 408.04, 612.15 and 119.50 is: 179.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.04 : 612.15 = 119.50 : x
  2. Step 2: Convert to fraction form
    408.04/612.15 = 119.50/x
  3. Step 3: Cross multiply
    408.04x = 612.15 × 119.50
  4. Step 4: Simplify right side
    408.04x = 73,151.93
  5. Step 5: Solve for x
    x = 73,151.93/408.04
  6. Step 6: Final answer
    x = 179.28

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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.