Home / 3,191.38-4,784.76-2,148.80

Finding the Fourth Proportional to 3,191.38, 4,784.76 and 2,148.80

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Solution

The fourth proportional to 3,191.38, 4,784.76 and 2,148.80 is: 3,221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.38 : 4,784.76 = 2,148.80 : x
  2. Step 2: Convert to fraction form
    3,191.38/4,784.76 = 2,148.80/x
  3. Step 3: Cross multiply
    3,191.38x = 4,784.76 × 2,148.80
  4. Step 4: Simplify right side
    3,191.38x = 10,281,468.36
  5. Step 5: Solve for x
    x = 10,281,468.36/3,191.38
  6. Step 6: Final answer
    x = 3,221.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.