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Finding the Fourth Proportional to 443.41, 663.05 and 394.94

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Solution

The fourth proportional to 443.41, 663.05 and 394.94 is: 590.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.41 : 663.05 = 394.94 : x
  2. Step 2: Convert to fraction form
    443.41/663.05 = 394.94/x
  3. Step 3: Cross multiply
    443.41x = 663.05 × 394.94
  4. Step 4: Simplify right side
    443.41x = 261,867.61
  5. Step 5: Solve for x
    x = 261,867.61/443.41
  6. Step 6: Final answer
    x = 590.58

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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.