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Finding the Fourth Proportional to 388.02, 582.09 and 131.50

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Solution

The fourth proportional to 388.02, 582.09 and 131.50 is: 197.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.02 : 582.09 = 131.50 : x
  2. Step 2: Convert to fraction form
    388.02/582.09 = 131.50/x
  3. Step 3: Cross multiply
    388.02x = 582.09 × 131.50
  4. Step 4: Simplify right side
    388.02x = 76,544.84
  5. Step 5: Solve for x
    x = 76,544.84/388.02
  6. Step 6: Final answer
    x = 197.27

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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.