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Finding the Fourth Proportional to 189.65, 282.35 and 188.75

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Solution

The fourth proportional to 189.65, 282.35 and 188.75 is: 281.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.65 : 282.35 = 188.75 : x
  2. Step 2: Convert to fraction form
    189.65/282.35 = 188.75/x
  3. Step 3: Cross multiply
    189.65x = 282.35 × 188.75
  4. Step 4: Simplify right side
    189.65x = 53,293.56
  5. Step 5: Solve for x
    x = 53,293.56/189.65
  6. Step 6: Final answer
    x = 281.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.