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Finding the Fourth Proportional to 320.88, 445.13 and 304.48

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Solution

The fourth proportional to 320.88, 445.13 and 304.48 is: 422.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.88 : 445.13 = 304.48 : x
  2. Step 2: Convert to fraction form
    320.88/445.13 = 304.48/x
  3. Step 3: Cross multiply
    320.88x = 445.13 × 304.48
  4. Step 4: Simplify right side
    320.88x = 135,533.18
  5. Step 5: Solve for x
    x = 135,533.18/320.88
  6. Step 6: Final answer
    x = 422.38

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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.