Home / 3,186.80-4,397.76-1,789.55

Finding the Fourth Proportional to 3,186.80, 4,397.76 and 1,789.55

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Solution

The fourth proportional to 3,186.80, 4,397.76 and 1,789.55 is: 2,469.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.80 : 4,397.76 = 1,789.55 : x
  2. Step 2: Convert to fraction form
    3,186.80/4,397.76 = 1,789.55/x
  3. Step 3: Cross multiply
    3,186.80x = 4,397.76 × 1,789.55
  4. Step 4: Simplify right side
    3,186.80x = 7,870,011.41
  5. Step 5: Solve for x
    x = 7,870,011.41/3,186.80
  6. Step 6: Final answer
    x = 2,469.57

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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.