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Finding the Fourth Proportional to 454.92, 678.81 and 408.92

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Solution

The fourth proportional to 454.92, 678.81 and 408.92 is: 610.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.92 : 678.81 = 408.92 : x
  2. Step 2: Convert to fraction form
    454.92/678.81 = 408.92/x
  3. Step 3: Cross multiply
    454.92x = 678.81 × 408.92
  4. Step 4: Simplify right side
    454.92x = 277,578.99
  5. Step 5: Solve for x
    x = 277,578.99/454.92
  6. Step 6: Final answer
    x = 610.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.