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Finding the Fourth Proportional to 439.04, 655.47 and 335.78

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Solution

The fourth proportional to 439.04, 655.47 and 335.78 is: 501.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.04 : 655.47 = 335.78 : x
  2. Step 2: Convert to fraction form
    439.04/655.47 = 335.78/x
  3. Step 3: Cross multiply
    439.04x = 655.47 × 335.78
  4. Step 4: Simplify right side
    439.04x = 220,093.72
  5. Step 5: Solve for x
    x = 220,093.72/439.04
  6. Step 6: Final answer
    x = 501.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.