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Finding the Fourth Proportional to 190.79, 263.55 and 135.41

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Solution

The fourth proportional to 190.79, 263.55 and 135.41 is: 187.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.79 : 263.55 = 135.41 : x
  2. Step 2: Convert to fraction form
    190.79/263.55 = 135.41/x
  3. Step 3: Cross multiply
    190.79x = 263.55 × 135.41
  4. Step 4: Simplify right side
    190.79x = 35,686.50
  5. Step 5: Solve for x
    x = 35,686.50/190.79
  6. Step 6: Final answer
    x = 187.05

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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.