Home / 3,143.76-4,339.40-1,902.80

Finding the Fourth Proportional to 3,143.76, 4,339.40 and 1,902.80

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Solution

The fourth proportional to 3,143.76, 4,339.40 and 1,902.80 is: 2,626.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.76 : 4,339.40 = 1,902.80 : x
  2. Step 2: Convert to fraction form
    3,143.76/4,339.40 = 1,902.80/x
  3. Step 3: Cross multiply
    3,143.76x = 4,339.40 × 1,902.80
  4. Step 4: Simplify right side
    3,143.76x = 8,257,010.32
  5. Step 5: Solve for x
    x = 8,257,010.32/3,143.76
  6. Step 6: Final answer
    x = 2,626.48

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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.