Home / 1,281.62-1,910.26-1,211.06

Finding the Fourth Proportional to 1,281.62, 1,910.26 and 1,211.06

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Solution

The fourth proportional to 1,281.62, 1,910.26 and 1,211.06 is: 1,805.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.62 : 1,910.26 = 1,211.06 : x
  2. Step 2: Convert to fraction form
    1,281.62/1,910.26 = 1,211.06/x
  3. Step 3: Cross multiply
    1,281.62x = 1,910.26 × 1,211.06
  4. Step 4: Simplify right side
    1,281.62x = 2,313,439.48
  5. Step 5: Solve for x
    x = 2,313,439.48/1,281.62
  6. Step 6: Final answer
    x = 1,805.09

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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.