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Finding the Fourth Proportional to 281.80, 388.74 and 183.61

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Solution

The fourth proportional to 281.80, 388.74 and 183.61 is: 253.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.80 : 388.74 = 183.61 : x
  2. Step 2: Convert to fraction form
    281.80/388.74 = 183.61/x
  3. Step 3: Cross multiply
    281.80x = 388.74 × 183.61
  4. Step 4: Simplify right side
    281.80x = 71,376.55
  5. Step 5: Solve for x
    x = 71,376.55/281.80
  6. Step 6: Final answer
    x = 253.29

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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.