Home / 2,840.50-3,920.26-1,721.86

Finding the Fourth Proportional to 2,840.50, 3,920.26 and 1,721.86

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Solution

The fourth proportional to 2,840.50, 3,920.26 and 1,721.86 is: 2,376.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.50 : 3,920.26 = 1,721.86 : x
  2. Step 2: Convert to fraction form
    2,840.50/3,920.26 = 1,721.86/x
  3. Step 3: Cross multiply
    2,840.50x = 3,920.26 × 1,721.86
  4. Step 4: Simplify right side
    2,840.50x = 6,750,138.88
  5. Step 5: Solve for x
    x = 6,750,138.88/2,840.50
  6. Step 6: Final answer
    x = 2,376.39

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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.