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Finding the Fourth Proportional to 466.05, 641.00 and 391.33

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Solution

The fourth proportional to 466.05, 641.00 and 391.33 is: 538.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.05 : 641.00 = 391.33 : x
  2. Step 2: Convert to fraction form
    466.05/641.00 = 391.33/x
  3. Step 3: Cross multiply
    466.05x = 641.00 × 391.33
  4. Step 4: Simplify right side
    466.05x = 250,837.37
  5. Step 5: Solve for x
    x = 250,837.37/466.05
  6. Step 6: Final answer
    x = 538.22

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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.