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Finding the Fourth Proportional to 189.60, 283.74 and 164.22

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Solution

The fourth proportional to 189.60, 283.74 and 164.22 is: 245.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.60 : 283.74 = 164.22 : x
  2. Step 2: Convert to fraction form
    189.60/283.74 = 164.22/x
  3. Step 3: Cross multiply
    189.60x = 283.74 × 164.22
  4. Step 4: Simplify right side
    189.60x = 46,595.78
  5. Step 5: Solve for x
    x = 46,595.78/189.60
  6. Step 6: Final answer
    x = 245.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.