Home / 2,115.57-3,175.40-1,020.70

Finding the Fourth Proportional to 2,115.57, 3,175.40 and 1,020.70

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Solution

The fourth proportional to 2,115.57, 3,175.40 and 1,020.70 is: 1,532.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.57 : 3,175.40 = 1,020.70 : x
  2. Step 2: Convert to fraction form
    2,115.57/3,175.40 = 1,020.70/x
  3. Step 3: Cross multiply
    2,115.57x = 3,175.40 × 1,020.70
  4. Step 4: Simplify right side
    2,115.57x = 3,241,120.29
  5. Step 5: Solve for x
    x = 3,241,120.29/2,115.57
  6. Step 6: Final answer
    x = 1,532.04

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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.