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Finding the Fourth Proportional to 320.12, 441.57 and 189.11

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Solution

The fourth proportional to 320.12, 441.57 and 189.11 is: 260.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.12 : 441.57 = 189.11 : x
  2. Step 2: Convert to fraction form
    320.12/441.57 = 189.11/x
  3. Step 3: Cross multiply
    320.12x = 441.57 × 189.11
  4. Step 4: Simplify right side
    320.12x = 83,503.09
  5. Step 5: Solve for x
    x = 83,503.09/320.12
  6. Step 6: Final answer
    x = 260.85

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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.