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Finding the Fourth Proportional to 339.02, 469.99 and 320.54

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Solution

The fourth proportional to 339.02, 469.99 and 320.54 is: 444.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.02 : 469.99 = 320.54 : x
  2. Step 2: Convert to fraction form
    339.02/469.99 = 320.54/x
  3. Step 3: Cross multiply
    339.02x = 469.99 × 320.54
  4. Step 4: Simplify right side
    339.02x = 150,649.49
  5. Step 5: Solve for x
    x = 150,649.49/339.02
  6. Step 6: Final answer
    x = 444.37

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.