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Finding the Fourth Proportional to 189.59, 285.78 and 173.99

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Solution

The fourth proportional to 189.59, 285.78 and 173.99 is: 262.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.59 : 285.78 = 173.99 : x
  2. Step 2: Convert to fraction form
    189.59/285.78 = 173.99/x
  3. Step 3: Cross multiply
    189.59x = 285.78 × 173.99
  4. Step 4: Simplify right side
    189.59x = 49,722.58
  5. Step 5: Solve for x
    x = 49,722.58/189.59
  6. Step 6: Final answer
    x = 262.26

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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.