Home / 2,840.50-3,919.48-1,721.49

Finding the Fourth Proportional to 2,840.50, 3,919.48 and 1,721.49

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Solution

The fourth proportional to 2,840.50, 3,919.48 and 1,721.49 is: 2,375.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.50 : 3,919.48 = 1,721.49 : x
  2. Step 2: Convert to fraction form
    2,840.50/3,919.48 = 1,721.49/x
  3. Step 3: Cross multiply
    2,840.50x = 3,919.48 × 1,721.49
  4. Step 4: Simplify right side
    2,840.50x = 6,747,345.63
  5. Step 5: Solve for x
    x = 6,747,345.63/2,840.50
  6. Step 6: Final answer
    x = 2,375.41

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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.