Home / 1,972.22-2,959.36-1,278.71

Finding the Fourth Proportional to 1,972.22, 2,959.36 and 1,278.71

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Solution

The fourth proportional to 1,972.22, 2,959.36 and 1,278.71 is: 1,918.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.22 : 2,959.36 = 1,278.71 : x
  2. Step 2: Convert to fraction form
    1,972.22/2,959.36 = 1,278.71/x
  3. Step 3: Cross multiply
    1,972.22x = 2,959.36 × 1,278.71
  4. Step 4: Simplify right side
    1,972.22x = 3,784,163.23
  5. Step 5: Solve for x
    x = 3,784,163.23/1,972.22
  6. Step 6: Final answer
    x = 1,918.73

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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.