Home / 2,013.80-2,779.11-1,217.39

Finding the Fourth Proportional to 2,013.80, 2,779.11 and 1,217.39

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Solution

The fourth proportional to 2,013.80, 2,779.11 and 1,217.39 is: 1,680.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.80 : 2,779.11 = 1,217.39 : x
  2. Step 2: Convert to fraction form
    2,013.80/2,779.11 = 1,217.39/x
  3. Step 3: Cross multiply
    2,013.80x = 2,779.11 × 1,217.39
  4. Step 4: Simplify right side
    2,013.80x = 3,383,246.83
  5. Step 5: Solve for x
    x = 3,383,246.83/2,013.80
  6. Step 6: Final answer
    x = 1,680.04

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1.5x scale

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.