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Finding the Fourth Proportional to 281.39, 419.91 and 250.71

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Solution

The fourth proportional to 281.39, 419.91 and 250.71 is: 374.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.39 : 419.91 = 250.71 : x
  2. Step 2: Convert to fraction form
    281.39/419.91 = 250.71/x
  3. Step 3: Cross multiply
    281.39x = 419.91 × 250.71
  4. Step 4: Simplify right side
    281.39x = 105,273.12
  5. Step 5: Solve for x
    x = 105,273.12/281.39
  6. Step 6: Final answer
    x = 374.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.