Home / 1,336.40-1,996.48-1,329.92

Finding the Fourth Proportional to 1,336.40, 1,996.48 and 1,329.92

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Solution

The fourth proportional to 1,336.40, 1,996.48 and 1,329.92 is: 1,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,336.40 : 1,996.48 = 1,329.92 : x
  2. Step 2: Convert to fraction form
    1,336.40/1,996.48 = 1,329.92/x
  3. Step 3: Cross multiply
    1,336.40x = 1,996.48 × 1,329.92
  4. Step 4: Simplify right side
    1,336.40x = 2,655,158.68
  5. Step 5: Solve for x
    x = 2,655,158.68/1,336.40
  6. Step 6: Final answer
    x = 1,986.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.