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Finding the Fourth Proportional to 190.65, 287.10 and 158.46

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Solution

The fourth proportional to 190.65, 287.10 and 158.46 is: 238.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.65 : 287.10 = 158.46 : x
  2. Step 2: Convert to fraction form
    190.65/287.10 = 158.46/x
  3. Step 3: Cross multiply
    190.65x = 287.10 × 158.46
  4. Step 4: Simplify right side
    190.65x = 45,493.87
  5. Step 5: Solve for x
    x = 45,493.87/190.65
  6. Step 6: Final answer
    x = 238.63

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.