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Finding the Fourth Proportional to 320.19, 441.72 and 189.15

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Solution

The fourth proportional to 320.19, 441.72 and 189.15 is: 260.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.19 : 441.72 = 189.15 : x
  2. Step 2: Convert to fraction form
    320.19/441.72 = 189.15/x
  3. Step 3: Cross multiply
    320.19x = 441.72 × 189.15
  4. Step 4: Simplify right side
    320.19x = 83,551.34
  5. Step 5: Solve for x
    x = 83,551.34/320.19
  6. Step 6: Final answer
    x = 260.94

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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.