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Finding the Fourth Proportional to 189.32, 283.65 and 97.79

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Solution

The fourth proportional to 189.32, 283.65 and 97.79 is: 146.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.32 : 283.65 = 97.79 : x
  2. Step 2: Convert to fraction form
    189.32/283.65 = 97.79/x
  3. Step 3: Cross multiply
    189.32x = 283.65 × 97.79
  4. Step 4: Simplify right side
    189.32x = 27,738.13
  5. Step 5: Solve for x
    x = 27,738.13/189.32
  6. Step 6: Final answer
    x = 146.51

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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.