Home / 1,959.12-2,921.40-1,686.96

Finding the Fourth Proportional to 1,959.12, 2,921.40 and 1,686.96

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Solution

The fourth proportional to 1,959.12, 2,921.40 and 1,686.96 is: 2,515.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.12 : 2,921.40 = 1,686.96 : x
  2. Step 2: Convert to fraction form
    1,959.12/2,921.40 = 1,686.96/x
  3. Step 3: Cross multiply
    1,959.12x = 2,921.40 × 1,686.96
  4. Step 4: Simplify right side
    1,959.12x = 4,928,284.94
  5. Step 5: Solve for x
    x = 4,928,284.94/1,959.12
  6. Step 6: Final answer
    x = 2,515.56

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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.