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Finding the Fourth Proportional to 190.55, 285.44 and 144.35

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Solution

The fourth proportional to 190.55, 285.44 and 144.35 is: 216.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.55 : 285.44 = 144.35 : x
  2. Step 2: Convert to fraction form
    190.55/285.44 = 144.35/x
  3. Step 3: Cross multiply
    190.55x = 285.44 × 144.35
  4. Step 4: Simplify right side
    190.55x = 41,203.90
  5. Step 5: Solve for x
    x = 41,203.90/190.55
  6. Step 6: Final answer
    x = 216.24

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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.