Home / 1,286.70-1,771.18-1,110.25

Finding the Fourth Proportional to 1,286.70, 1,771.18 and 1,110.25

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Solution

The fourth proportional to 1,286.70, 1,771.18 and 1,110.25 is: 1,528.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.70 : 1,771.18 = 1,110.25 : x
  2. Step 2: Convert to fraction form
    1,286.70/1,771.18 = 1,110.25/x
  3. Step 3: Cross multiply
    1,286.70x = 1,771.18 × 1,110.25
  4. Step 4: Simplify right side
    1,286.70x = 1,966,452.60
  5. Step 5: Solve for x
    x = 1,966,452.60/1,286.70
  6. Step 6: Final answer
    x = 1,528.29

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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.