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Finding the Fourth Proportional to 604.65, 905.45 and 439.47

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Solution

The fourth proportional to 604.65, 905.45 and 439.47 is: 658.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.65 : 905.45 = 439.47 : x
  2. Step 2: Convert to fraction form
    604.65/905.45 = 439.47/x
  3. Step 3: Cross multiply
    604.65x = 905.45 × 439.47
  4. Step 4: Simplify right side
    604.65x = 397,915.91
  5. Step 5: Solve for x
    x = 397,915.91/604.65
  6. Step 6: Final answer
    x = 658.09

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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.