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Finding the Fourth Proportional to 439.27, 604.85 and 383.68

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Solution

The fourth proportional to 439.27, 604.85 and 383.68 is: 528.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.27 : 604.85 = 383.68 : x
  2. Step 2: Convert to fraction form
    439.27/604.85 = 383.68/x
  3. Step 3: Cross multiply
    439.27x = 604.85 × 383.68
  4. Step 4: Simplify right side
    439.27x = 232,066.93
  5. Step 5: Solve for x
    x = 232,066.93/439.27
  6. Step 6: Final answer
    x = 528.31

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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.