Home / 3,147.20-4,697.48-2,778.20

Finding the Fourth Proportional to 3,147.20, 4,697.48 and 2,778.20

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Solution

The fourth proportional to 3,147.20, 4,697.48 and 2,778.20 is: 4,146.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.20 : 4,697.48 = 2,778.20 : x
  2. Step 2: Convert to fraction form
    3,147.20/4,697.48 = 2,778.20/x
  3. Step 3: Cross multiply
    3,147.20x = 4,697.48 × 2,778.20
  4. Step 4: Simplify right side
    3,147.20x = 13,050,538.94
  5. Step 5: Solve for x
    x = 13,050,538.94/3,147.20
  6. Step 6: Final answer
    x = 4,146.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.