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Finding the Fourth Proportional to 388.09, 582.23 and 193.18

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Solution

The fourth proportional to 388.09, 582.23 and 193.18 is: 289.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.09 : 582.23 = 193.18 : x
  2. Step 2: Convert to fraction form
    388.09/582.23 = 193.18/x
  3. Step 3: Cross multiply
    388.09x = 582.23 × 193.18
  4. Step 4: Simplify right side
    388.09x = 112,477.13
  5. Step 5: Solve for x
    x = 112,477.13/388.09
  6. Step 6: Final answer
    x = 289.82

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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.