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Finding the Fourth Proportional to 189.07, 283.22 and 140.47

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Solution

The fourth proportional to 189.07, 283.22 and 140.47 is: 210.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.07 : 283.22 = 140.47 : x
  2. Step 2: Convert to fraction form
    189.07/283.22 = 140.47/x
  3. Step 3: Cross multiply
    189.07x = 283.22 × 140.47
  4. Step 4: Simplify right side
    189.07x = 39,783.91
  5. Step 5: Solve for x
    x = 39,783.91/189.07
  6. Step 6: Final answer
    x = 210.42

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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.