Home / 1,282.06-1,921.47-1,107.91

Finding the Fourth Proportional to 1,282.06, 1,921.47 and 1,107.91

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Solution

The fourth proportional to 1,282.06, 1,921.47 and 1,107.91 is: 1,660.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.06 : 1,921.47 = 1,107.91 : x
  2. Step 2: Convert to fraction form
    1,282.06/1,921.47 = 1,107.91/x
  3. Step 3: Cross multiply
    1,282.06x = 1,921.47 × 1,107.91
  4. Step 4: Simplify right side
    1,282.06x = 2,128,815.83
  5. Step 5: Solve for x
    x = 2,128,815.83/1,282.06
  6. Step 6: Final answer
    x = 1,660.47

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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.