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Finding the Fourth Proportional to 451.45, 674.13 and 425.82

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Solution

The fourth proportional to 451.45, 674.13 and 425.82 is: 635.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.45 : 674.13 = 425.82 : x
  2. Step 2: Convert to fraction form
    451.45/674.13 = 425.82/x
  3. Step 3: Cross multiply
    451.45x = 674.13 × 425.82
  4. Step 4: Simplify right side
    451.45x = 287,058.04
  5. Step 5: Solve for x
    x = 287,058.04/451.45
  6. Step 6: Final answer
    x = 635.86

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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.