Home / 2,013.56-2,778.80-1,257.79

Finding the Fourth Proportional to 2,013.56, 2,778.80 and 1,257.79

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Solution

The fourth proportional to 2,013.56, 2,778.80 and 1,257.79 is: 1,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,013.56 : 2,778.80 = 1,257.79 : x
  2. Step 2: Convert to fraction form
    2,013.56/2,778.80 = 1,257.79/x
  3. Step 3: Cross multiply
    2,013.56x = 2,778.80 × 1,257.79
  4. Step 4: Simplify right side
    2,013.56x = 3,495,143.05
  5. Step 5: Solve for x
    x = 3,495,143.05/2,013.56
  6. Step 6: Final answer
    x = 1,735.80

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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.