Home / 3,428.80-5,141.40-1,237.20

Finding the Fourth Proportional to 3,428.80, 5,141.40 and 1,237.20

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Solution

The fourth proportional to 3,428.80, 5,141.40 and 1,237.20 is: 1,855.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.80 : 5,141.40 = 1,237.20 : x
  2. Step 2: Convert to fraction form
    3,428.80/5,141.40 = 1,237.20/x
  3. Step 3: Cross multiply
    3,428.80x = 5,141.40 × 1,237.20
  4. Step 4: Simplify right side
    3,428.80x = 6,360,940.08
  5. Step 5: Solve for x
    x = 6,360,940.08/3,428.80
  6. Step 6: Final answer
    x = 1,855.15

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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.