Home / 1,921.90-2,883.81-1,272.46

Finding the Fourth Proportional to 1,921.90, 2,883.81 and 1,272.46

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Solution

The fourth proportional to 1,921.90, 2,883.81 and 1,272.46 is: 1,909.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.90 : 2,883.81 = 1,272.46 : x
  2. Step 2: Convert to fraction form
    1,921.90/2,883.81 = 1,272.46/x
  3. Step 3: Cross multiply
    1,921.90x = 2,883.81 × 1,272.46
  4. Step 4: Simplify right side
    1,921.90x = 3,669,532.87
  5. Step 5: Solve for x
    x = 3,669,532.87/1,921.90
  6. Step 6: Final answer
    x = 1,909.33

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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.