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Finding the Fourth Proportional to 281.26, 419.50 and 276.40

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Solution

The fourth proportional to 281.26, 419.50 and 276.40 is: 412.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.26 : 419.50 = 276.40 : x
  2. Step 2: Convert to fraction form
    281.26/419.50 = 276.40/x
  3. Step 3: Cross multiply
    281.26x = 419.50 × 276.40
  4. Step 4: Simplify right side
    281.26x = 115,949.80
  5. Step 5: Solve for x
    x = 115,949.80/281.26
  6. Step 6: Final answer
    x = 412.25

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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.