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Finding the Fourth Proportional to 383.44, 529.22 and 215.43

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Solution

The fourth proportional to 383.44, 529.22 and 215.43 is: 297.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.44 : 529.22 = 215.43 : x
  2. Step 2: Convert to fraction form
    383.44/529.22 = 215.43/x
  3. Step 3: Cross multiply
    383.44x = 529.22 × 215.43
  4. Step 4: Simplify right side
    383.44x = 114,008.79
  5. Step 5: Solve for x
    x = 114,008.79/383.44
  6. Step 6: Final answer
    x = 297.33

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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.