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Finding the Fourth Proportional to 189.10, 282.84 and 140.50

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Solution

The fourth proportional to 189.10, 282.84 and 140.50 is: 210.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.10 : 282.84 = 140.50 : x
  2. Step 2: Convert to fraction form
    189.10/282.84 = 140.50/x
  3. Step 3: Cross multiply
    189.10x = 282.84 × 140.50
  4. Step 4: Simplify right side
    189.10x = 39,739.02
  5. Step 5: Solve for x
    x = 39,739.02/189.10
  6. Step 6: Final answer
    x = 210.15

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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.