Home / 1,328.40-1,837.80-1,299.60

Finding the Fourth Proportional to 1,328.40, 1,837.80 and 1,299.60

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Solution

The fourth proportional to 1,328.40, 1,837.80 and 1,299.60 is: 1,797.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.40 : 1,837.80 = 1,299.60 : x
  2. Step 2: Convert to fraction form
    1,328.40/1,837.80 = 1,299.60/x
  3. Step 3: Cross multiply
    1,328.40x = 1,837.80 × 1,299.60
  4. Step 4: Simplify right side
    1,328.40x = 2,388,404.88
  5. Step 5: Solve for x
    x = 2,388,404.88/1,328.40
  6. Step 6: Final answer
    x = 1,797.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.