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Finding the Fourth Proportional to 204.79, 282.48 and 155.56

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Solution

The fourth proportional to 204.79, 282.48 and 155.56 is: 214.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.79 : 282.48 = 155.56 : x
  2. Step 2: Convert to fraction form
    204.79/282.48 = 155.56/x
  3. Step 3: Cross multiply
    204.79x = 282.48 × 155.56
  4. Step 4: Simplify right side
    204.79x = 43,942.59
  5. Step 5: Solve for x
    x = 43,942.59/204.79
  6. Step 6: Final answer
    x = 214.57

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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.