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Finding the Fourth Proportional to 442.76, 664.94 and 388.08

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Solution

The fourth proportional to 442.76, 664.94 and 388.08 is: 582.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.76 : 664.94 = 388.08 : x
  2. Step 2: Convert to fraction form
    442.76/664.94 = 388.08/x
  3. Step 3: Cross multiply
    442.76x = 664.94 × 388.08
  4. Step 4: Simplify right side
    442.76x = 258,047.97
  5. Step 5: Solve for x
    x = 258,047.97/442.76
  6. Step 6: Final answer
    x = 582.82

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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.