Home / 3,428.60-5,139.30-1,347.80

Finding the Fourth Proportional to 3,428.60, 5,139.30 and 1,347.80

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Solution

The fourth proportional to 3,428.60, 5,139.30 and 1,347.80 is: 2,020.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.60 : 5,139.30 = 1,347.80 : x
  2. Step 2: Convert to fraction form
    3,428.60/5,139.30 = 1,347.80/x
  3. Step 3: Cross multiply
    3,428.60x = 5,139.30 × 1,347.80
  4. Step 4: Simplify right side
    3,428.60x = 6,926,748.54
  5. Step 5: Solve for x
    x = 6,926,748.54/3,428.60
  6. Step 6: Final answer
    x = 2,020.28

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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.