Home / 3,271.20-4,905.78-1,079.40

Finding the Fourth Proportional to 3,271.20, 4,905.78 and 1,079.40

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Solution

The fourth proportional to 3,271.20, 4,905.78 and 1,079.40 is: 1,618.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,271.20 : 4,905.78 = 1,079.40 : x
  2. Step 2: Convert to fraction form
    3,271.20/4,905.78 = 1,079.40/x
  3. Step 3: Cross multiply
    3,271.20x = 4,905.78 × 1,079.40
  4. Step 4: Simplify right side
    3,271.20x = 5,295,298.93
  5. Step 5: Solve for x
    x = 5,295,298.93/3,271.20
  6. Step 6: Final answer
    x = 1,618.76

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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.