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Finding the Fourth Proportional to 408.41, 612.18 and 310.64

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Solution

The fourth proportional to 408.41, 612.18 and 310.64 is: 465.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.41 : 612.18 = 310.64 : x
  2. Step 2: Convert to fraction form
    408.41/612.18 = 310.64/x
  3. Step 3: Cross multiply
    408.41x = 612.18 × 310.64
  4. Step 4: Simplify right side
    408.41x = 190,164.53
  5. Step 5: Solve for x
    x = 190,164.53/408.41
  6. Step 6: Final answer
    x = 465.63

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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.