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Finding the Fourth Proportional to 451.05, 621.72 and 326.54

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Solution

The fourth proportional to 451.05, 621.72 and 326.54 is: 450.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.05 : 621.72 = 326.54 : x
  2. Step 2: Convert to fraction form
    451.05/621.72 = 326.54/x
  3. Step 3: Cross multiply
    451.05x = 621.72 × 326.54
  4. Step 4: Simplify right side
    451.05x = 203,013.34
  5. Step 5: Solve for x
    x = 203,013.34/451.05
  6. Step 6: Final answer
    x = 450.09

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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.