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Finding the Fourth Proportional to 408.37, 612.68 and 148.37

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Solution

The fourth proportional to 408.37, 612.68 and 148.37 is: 222.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.37 : 612.68 = 148.37 : x
  2. Step 2: Convert to fraction form
    408.37/612.68 = 148.37/x
  3. Step 3: Cross multiply
    408.37x = 612.68 × 148.37
  4. Step 4: Simplify right side
    408.37x = 90,903.33
  5. Step 5: Solve for x
    x = 90,903.33/408.37
  6. Step 6: Final answer
    x = 222.60

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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.