Home / 2,685.38-3,706.43-1,638.05

Finding the Fourth Proportional to 2,685.38, 3,706.43 and 1,638.05

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Solution

The fourth proportional to 2,685.38, 3,706.43 and 1,638.05 is: 2,260.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.38 : 3,706.43 = 1,638.05 : x
  2. Step 2: Convert to fraction form
    2,685.38/3,706.43 = 1,638.05/x
  3. Step 3: Cross multiply
    2,685.38x = 3,706.43 × 1,638.05
  4. Step 4: Simplify right side
    2,685.38x = 6,071,290.94
  5. Step 5: Solve for x
    x = 6,071,290.94/2,685.38
  6. Step 6: Final answer
    x = 2,260.87

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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.