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Finding the Fourth Proportional to 190.68, 285.31 and 157.87

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Solution

The fourth proportional to 190.68, 285.31 and 157.87 is: 236.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.68 : 285.31 = 157.87 : x
  2. Step 2: Convert to fraction form
    190.68/285.31 = 157.87/x
  3. Step 3: Cross multiply
    190.68x = 285.31 × 157.87
  4. Step 4: Simplify right side
    190.68x = 45,041.89
  5. Step 5: Solve for x
    x = 45,041.89/190.68
  6. Step 6: Final answer
    x = 236.22

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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.