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Finding the Fourth Proportional to 439.71, 603.08 and 428.73

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Solution

The fourth proportional to 439.71, 603.08 and 428.73 is: 588.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.71 : 603.08 = 428.73 : x
  2. Step 2: Convert to fraction form
    439.71/603.08 = 428.73/x
  3. Step 3: Cross multiply
    439.71x = 603.08 × 428.73
  4. Step 4: Simplify right side
    439.71x = 258,556.34
  5. Step 5: Solve for x
    x = 258,556.34/439.71
  6. Step 6: Final answer
    x = 588.02

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.