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Finding the Fourth Proportional to 442.44, 662.04 and 391.86

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Solution

The fourth proportional to 442.44, 662.04 and 391.86 is: 586.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.44 : 662.04 = 391.86 : x
  2. Step 2: Convert to fraction form
    442.44/662.04 = 391.86/x
  3. Step 3: Cross multiply
    442.44x = 662.04 × 391.86
  4. Step 4: Simplify right side
    442.44x = 259,426.99
  5. Step 5: Solve for x
    x = 259,426.99/442.44
  6. Step 6: Final answer
    x = 586.36

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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.