Home / 3,219.81-4,830-1,271.55

Finding the Fourth Proportional to 3,219.81, 4,830 and 1,271.55

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Solution

The fourth proportional to 3,219.81, 4,830 and 1,271.55 is: 1,907.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.81 : 4,830 = 1,271.55 : x
  2. Step 2: Convert to fraction form
    3,219.81/4,830 = 1,271.55/x
  3. Step 3: Cross multiply
    3,219.81x = 4,830 × 1,271.55
  4. Step 4: Simplify right side
    3,219.81x = 6,141,586.50
  5. Step 5: Solve for x
    x = 6,141,586.50/3,219.81
  6. Step 6: Final answer
    x = 1,907.44

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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.