Home / 1,912.89-2,866.64-1,521.15

Finding the Fourth Proportional to 1,912.89, 2,866.64 and 1,521.15

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Solution

The fourth proportional to 1,912.89, 2,866.64 and 1,521.15 is: 2,279.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.89 : 2,866.64 = 1,521.15 : x
  2. Step 2: Convert to fraction form
    1,912.89/2,866.64 = 1,521.15/x
  3. Step 3: Cross multiply
    1,912.89x = 2,866.64 × 1,521.15
  4. Step 4: Simplify right side
    1,912.89x = 4,360,589.44
  5. Step 5: Solve for x
    x = 4,360,589.44/1,912.89
  6. Step 6: Final answer
    x = 2,279.58

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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.