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Finding the Fourth Proportional to 281.81, 388.78 and 183.54

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Solution

The fourth proportional to 281.81, 388.78 and 183.54 is: 253.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.81 : 388.78 = 183.54 : x
  2. Step 2: Convert to fraction form
    281.81/388.78 = 183.54/x
  3. Step 3: Cross multiply
    281.81x = 388.78 × 183.54
  4. Step 4: Simplify right side
    281.81x = 71,356.68
  5. Step 5: Solve for x
    x = 71,356.68/281.81
  6. Step 6: Final answer
    x = 253.21

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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.