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Finding the Fourth Proportional to 341.69, 472.05 and 321.12

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Solution

The fourth proportional to 341.69, 472.05 and 321.12 is: 443.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.69 : 472.05 = 321.12 : x
  2. Step 2: Convert to fraction form
    341.69/472.05 = 321.12/x
  3. Step 3: Cross multiply
    341.69x = 472.05 × 321.12
  4. Step 4: Simplify right side
    341.69x = 151,584.70
  5. Step 5: Solve for x
    x = 151,584.70/341.69
  6. Step 6: Final answer
    x = 443.64

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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.