Home / 3,640.20-5,458.80-1,299.30

Finding the Fourth Proportional to 3,640.20, 5,458.80 and 1,299.30

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Solution

The fourth proportional to 3,640.20, 5,458.80 and 1,299.30 is: 1,948.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.20 : 5,458.80 = 1,299.30 : x
  2. Step 2: Convert to fraction form
    3,640.20/5,458.80 = 1,299.30/x
  3. Step 3: Cross multiply
    3,640.20x = 5,458.80 × 1,299.30
  4. Step 4: Simplify right side
    3,640.20x = 7,092,618.84
  5. Step 5: Solve for x
    x = 7,092,618.84/3,640.20
  6. Step 6: Final answer
    x = 1,948.41

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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.