Home / 1,282.62-1,911.75-1,212.06

Finding the Fourth Proportional to 1,282.62, 1,911.75 and 1,212.06

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Solution

The fourth proportional to 1,282.62, 1,911.75 and 1,212.06 is: 1,806.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.62 : 1,911.75 = 1,212.06 : x
  2. Step 2: Convert to fraction form
    1,282.62/1,911.75 = 1,212.06/x
  3. Step 3: Cross multiply
    1,282.62x = 1,911.75 × 1,212.06
  4. Step 4: Simplify right side
    1,282.62x = 2,317,155.71
  5. Step 5: Solve for x
    x = 2,317,155.71/1,282.62
  6. Step 6: Final answer
    x = 1,806.58

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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.