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Finding the Fourth Proportional to 632.64, 949.86 and 388.44

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Solution

The fourth proportional to 632.64, 949.86 and 388.44 is: 583.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.64 : 949.86 = 388.44 : x
  2. Step 2: Convert to fraction form
    632.64/949.86 = 388.44/x
  3. Step 3: Cross multiply
    632.64x = 949.86 × 388.44
  4. Step 4: Simplify right side
    632.64x = 368,963.62
  5. Step 5: Solve for x
    x = 368,963.62/632.64
  6. Step 6: Final answer
    x = 583.21

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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.