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Finding the Fourth Proportional to 439.65, 606.80 and 404.62

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Solution

The fourth proportional to 439.65, 606.80 and 404.62 is: 558.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.65 : 606.80 = 404.62 : x
  2. Step 2: Convert to fraction form
    439.65/606.80 = 404.62/x
  3. Step 3: Cross multiply
    439.65x = 606.80 × 404.62
  4. Step 4: Simplify right side
    439.65x = 245,523.42
  5. Step 5: Solve for x
    x = 245,523.42/439.65
  6. Step 6: Final answer
    x = 558.46

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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.