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Finding the Fourth Proportional to 189.79, 285.07 and 116.69

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Solution

The fourth proportional to 189.79, 285.07 and 116.69 is: 175.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.79 : 285.07 = 116.69 : x
  2. Step 2: Convert to fraction form
    189.79/285.07 = 116.69/x
  3. Step 3: Cross multiply
    189.79x = 285.07 × 116.69
  4. Step 4: Simplify right side
    189.79x = 33,264.92
  5. Step 5: Solve for x
    x = 33,264.92/189.79
  6. Step 6: Final answer
    x = 175.27

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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.