Home / 3,271.20-4,906.80-1,420.35

Finding the Fourth Proportional to 3,271.20, 4,906.80 and 1,420.35

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Solution

The fourth proportional to 3,271.20, 4,906.80 and 1,420.35 is: 2,130.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,271.20 : 4,906.80 = 1,420.35 : x
  2. Step 2: Convert to fraction form
    3,271.20/4,906.80 = 1,420.35/x
  3. Step 3: Cross multiply
    3,271.20x = 4,906.80 × 1,420.35
  4. Step 4: Simplify right side
    3,271.20x = 6,969,373.38
  5. Step 5: Solve for x
    x = 6,969,373.38/3,271.20
  6. Step 6: Final answer
    x = 2,130.53

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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.