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Finding the Fourth Proportional to 189.24, 284.01 and 98.11

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Solution

The fourth proportional to 189.24, 284.01 and 98.11 is: 147.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.24 : 284.01 = 98.11 : x
  2. Step 2: Convert to fraction form
    189.24/284.01 = 98.11/x
  3. Step 3: Cross multiply
    189.24x = 284.01 × 98.11
  4. Step 4: Simplify right side
    189.24x = 27,864.21
  5. Step 5: Solve for x
    x = 27,864.21/189.24
  6. Step 6: Final answer
    x = 147.25

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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.