Home / 3,785.76-5,221.20-2,458.80

Finding the Fourth Proportional to 3,785.76, 5,221.20 and 2,458.80

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Solution

The fourth proportional to 3,785.76, 5,221.20 and 2,458.80 is: 3,391.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.76 : 5,221.20 = 2,458.80 : x
  2. Step 2: Convert to fraction form
    3,785.76/5,221.20 = 2,458.80/x
  3. Step 3: Cross multiply
    3,785.76x = 5,221.20 × 2,458.80
  4. Step 4: Simplify right side
    3,785.76x = 12,837,886.56
  5. Step 5: Solve for x
    x = 12,837,886.56/3,785.76
  6. Step 6: Final answer
    x = 3,391.10

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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.