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Finding the Fourth Proportional to 189.28, 260.08 and 150.40

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Solution

The fourth proportional to 189.28, 260.08 and 150.40 is: 206.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.28 : 260.08 = 150.40 : x
  2. Step 2: Convert to fraction form
    189.28/260.08 = 150.40/x
  3. Step 3: Cross multiply
    189.28x = 260.08 × 150.40
  4. Step 4: Simplify right side
    189.28x = 39,116.03
  5. Step 5: Solve for x
    x = 39,116.03/189.28
  6. Step 6: Final answer
    x = 206.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.