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Finding the Fourth Proportional to 439.04, 606.40 and 308.48

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Solution

The fourth proportional to 439.04, 606.40 and 308.48 is: 426.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.04 : 606.40 = 308.48 : x
  2. Step 2: Convert to fraction form
    439.04/606.40 = 308.48/x
  3. Step 3: Cross multiply
    439.04x = 606.40 × 308.48
  4. Step 4: Simplify right side
    439.04x = 187,062.27
  5. Step 5: Solve for x
    x = 187,062.27/439.04
  6. Step 6: Final answer
    x = 426.07

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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.