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Finding the Fourth Proportional to 578.91, 799.35 and 447.69

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Solution

The fourth proportional to 578.91, 799.35 and 447.69 is: 618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.91 : 799.35 = 447.69 : x
  2. Step 2: Convert to fraction form
    578.91/799.35 = 447.69/x
  3. Step 3: Cross multiply
    578.91x = 799.35 × 447.69
  4. Step 4: Simplify right side
    578.91x = 357,861.00
  5. Step 5: Solve for x
    x = 357,861.00/578.91
  6. Step 6: Final answer
    x = 618.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.