Home / 1,912.38-2,640.93-1,647.87

Finding the Fourth Proportional to 1,912.38, 2,640.93 and 1,647.87

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Solution

The fourth proportional to 1,912.38, 2,640.93 and 1,647.87 is: 2,275.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.38 : 2,640.93 = 1,647.87 : x
  2. Step 2: Convert to fraction form
    1,912.38/2,640.93 = 1,647.87/x
  3. Step 3: Cross multiply
    1,912.38x = 2,640.93 × 1,647.87
  4. Step 4: Simplify right side
    1,912.38x = 4,351,909.32
  5. Step 5: Solve for x
    x = 4,351,909.32/1,912.38
  6. Step 6: Final answer
    x = 2,275.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.