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Finding the Fourth Proportional to 1,450.54, 1,999.92 and 1,284.40

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Solution

The fourth proportional to 1,450.54, 1,999.92 and 1,284.40 is: 1,770.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,450.54 : 1,999.92 = 1,284.40 : x
  2. Step 2: Convert to fraction form
    1,450.54/1,999.92 = 1,284.40/x
  3. Step 3: Cross multiply
    1,450.54x = 1,999.92 × 1,284.40
  4. Step 4: Simplify right side
    1,450.54x = 2,568,697.25
  5. Step 5: Solve for x
    x = 2,568,697.25/1,450.54
  6. Step 6: Final answer
    x = 1,770.86

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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.