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Finding the Fourth Proportional to 190.58, 262.99 and 115.91

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Solution

The fourth proportional to 190.58, 262.99 and 115.91 is: 159.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.58 : 262.99 = 115.91 : x
  2. Step 2: Convert to fraction form
    190.58/262.99 = 115.91/x
  3. Step 3: Cross multiply
    190.58x = 262.99 × 115.91
  4. Step 4: Simplify right side
    190.58x = 30,483.17
  5. Step 5: Solve for x
    x = 30,483.17/190.58
  6. Step 6: Final answer
    x = 159.95

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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.