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Finding the Fourth Proportional to 320.01, 441.63 and 189

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Solution

The fourth proportional to 320.01, 441.63 and 189 is: 260.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.01 : 441.63 = 189 : x
  2. Step 2: Convert to fraction form
    320.01/441.63 = 189/x
  3. Step 3: Cross multiply
    320.01x = 441.63 × 189
  4. Step 4: Simplify right side
    320.01x = 83,468.07
  5. Step 5: Solve for x
    x = 83,468.07/320.01
  6. Step 6: Final answer
    x = 260.83

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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.