Home / 1,290.08-1,934.39-412.37

Finding the Fourth Proportional to 1,290.08, 1,934.39 and 412.37

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Solution

The fourth proportional to 1,290.08, 1,934.39 and 412.37 is: 618.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.08 : 1,934.39 = 412.37 : x
  2. Step 2: Convert to fraction form
    1,290.08/1,934.39 = 412.37/x
  3. Step 3: Cross multiply
    1,290.08x = 1,934.39 × 412.37
  4. Step 4: Simplify right side
    1,290.08x = 797,687.18
  5. Step 5: Solve for x
    x = 797,687.18/1,290.08
  6. Step 6: Final answer
    x = 618.33

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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.