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Finding the Fourth Proportional to 447.93, 617.73 and 308.21

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Solution

The fourth proportional to 447.93, 617.73 and 308.21 is: 425.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.93 : 617.73 = 308.21 : x
  2. Step 2: Convert to fraction form
    447.93/617.73 = 308.21/x
  3. Step 3: Cross multiply
    447.93x = 617.73 × 308.21
  4. Step 4: Simplify right side
    447.93x = 190,386.32
  5. Step 5: Solve for x
    x = 190,386.32/447.93
  6. Step 6: Final answer
    x = 425.04

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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.