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Finding the Fourth Proportional to 189.77, 260.96 and 151.95

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Solution

The fourth proportional to 189.77, 260.96 and 151.95 is: 208.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.77 : 260.96 = 151.95 : x
  2. Step 2: Convert to fraction form
    189.77/260.96 = 151.95/x
  3. Step 3: Cross multiply
    189.77x = 260.96 × 151.95
  4. Step 4: Simplify right side
    189.77x = 39,653.90
  5. Step 5: Solve for x
    x = 39,653.90/189.77
  6. Step 6: Final answer
    x = 208.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.