Home / 1,329.51-1,980.62-1,269.54

Finding the Fourth Proportional to 1,329.51, 1,980.62 and 1,269.54

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Solution

The fourth proportional to 1,329.51, 1,980.62 and 1,269.54 is: 1,891.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.51 : 1,980.62 = 1,269.54 : x
  2. Step 2: Convert to fraction form
    1,329.51/1,980.62 = 1,269.54/x
  3. Step 3: Cross multiply
    1,329.51x = 1,980.62 × 1,269.54
  4. Step 4: Simplify right side
    1,329.51x = 2,514,465.03
  5. Step 5: Solve for x
    x = 2,514,465.03/1,329.51
  6. Step 6: Final answer
    x = 1,891.28

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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.