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Finding the Fourth Proportional to 190.56, 263.10 and 155.58

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Solution

The fourth proportional to 190.56, 263.10 and 155.58 is: 214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.56 : 263.10 = 155.58 : x
  2. Step 2: Convert to fraction form
    190.56/263.10 = 155.58/x
  3. Step 3: Cross multiply
    190.56x = 263.10 × 155.58
  4. Step 4: Simplify right side
    190.56x = 40,933.10
  5. Step 5: Solve for x
    x = 40,933.10/190.56
  6. Step 6: Final answer
    x = 214.80

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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.