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Finding the Fourth Proportional to 445.92, 618.00 and 439.09

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Solution

The fourth proportional to 445.92, 618.00 and 439.09 is: 608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.92 : 618.00 = 439.09 : x
  2. Step 2: Convert to fraction form
    445.92/618.00 = 439.09/x
  3. Step 3: Cross multiply
    445.92x = 618.00 × 439.09
  4. Step 4: Simplify right side
    445.92x = 271,354.43
  5. Step 5: Solve for x
    x = 271,354.43/445.92
  6. Step 6: Final answer
    x = 608.52

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.