Home / 3,401.60-5,098.80-1,320.80

Finding the Fourth Proportional to 3,401.60, 5,098.80 and 1,320.80

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Solution

The fourth proportional to 3,401.60, 5,098.80 and 1,320.80 is: 1,979.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,401.60 : 5,098.80 = 1,320.80 : x
  2. Step 2: Convert to fraction form
    3,401.60/5,098.80 = 1,320.80/x
  3. Step 3: Cross multiply
    3,401.60x = 5,098.80 × 1,320.80
  4. Step 4: Simplify right side
    3,401.60x = 6,734,495.04
  5. Step 5: Solve for x
    x = 6,734,495.04/3,401.60
  6. Step 6: Final answer
    x = 1,979.80

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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.