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Finding the Fourth Proportional to 445.79, 668.07 and 396.99

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Solution

The fourth proportional to 445.79, 668.07 and 396.99 is: 594.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.79 : 668.07 = 396.99 : x
  2. Step 2: Convert to fraction form
    445.79/668.07 = 396.99/x
  3. Step 3: Cross multiply
    445.79x = 668.07 × 396.99
  4. Step 4: Simplify right side
    445.79x = 265,217.11
  5. Step 5: Solve for x
    x = 265,217.11/445.79
  6. Step 6: Final answer
    x = 594.93

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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.