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Finding the Fourth Proportional to 451.28, 674.94 and 418.46

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Solution

The fourth proportional to 451.28, 674.94 and 418.46 is: 625.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.28 : 674.94 = 418.46 : x
  2. Step 2: Convert to fraction form
    451.28/674.94 = 418.46/x
  3. Step 3: Cross multiply
    451.28x = 674.94 × 418.46
  4. Step 4: Simplify right side
    451.28x = 282,435.39
  5. Step 5: Solve for x
    x = 282,435.39/451.28
  6. Step 6: Final answer
    x = 625.85

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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.