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Finding the Fourth Proportional to 320.32, 441.87 and 189.10

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Solution

The fourth proportional to 320.32, 441.87 and 189.10 is: 260.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.32 : 441.87 = 189.10 : x
  2. Step 2: Convert to fraction form
    320.32/441.87 = 189.10/x
  3. Step 3: Cross multiply
    320.32x = 441.87 × 189.10
  4. Step 4: Simplify right side
    320.32x = 83,555.41
  5. Step 5: Solve for x
    x = 83,555.41/320.32
  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.