Home / 1,284.85-1,921.78-1,072.48

Finding the Fourth Proportional to 1,284.85, 1,921.78 and 1,072.48

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Solution

The fourth proportional to 1,284.85, 1,921.78 and 1,072.48 is: 1,604.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.85 : 1,921.78 = 1,072.48 : x
  2. Step 2: Convert to fraction form
    1,284.85/1,921.78 = 1,072.48/x
  3. Step 3: Cross multiply
    1,284.85x = 1,921.78 × 1,072.48
  4. Step 4: Simplify right side
    1,284.85x = 2,061,066.73
  5. Step 5: Solve for x
    x = 2,061,066.73/1,284.85
  6. Step 6: Final answer
    x = 1,604.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.