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Finding the Fourth Proportional to 189.36, 285.66 and 181.80

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Solution

The fourth proportional to 189.36, 285.66 and 181.80 is: 274.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.36 : 285.66 = 181.80 : x
  2. Step 2: Convert to fraction form
    189.36/285.66 = 181.80/x
  3. Step 3: Cross multiply
    189.36x = 285.66 × 181.80
  4. Step 4: Simplify right side
    189.36x = 51,932.99
  5. Step 5: Solve for x
    x = 51,932.99/189.36
  6. Step 6: Final answer
    x = 274.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.