Home / 1,328,977.20-1,993,661.40-430,120.20

Finding the Fourth Proportional to 1,328,977.20, 1,993,661.40 and 430,120.20

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Solution

The fourth proportional to 1,328,977.20, 1,993,661.40 and 430,120.20 is: 645,243.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,977.20 : 1,993,661.40 = 430,120.20 : x
  2. Step 2: Convert to fraction form
    1,328,977.20/1,993,661.40 = 430,120.20/x
  3. Step 3: Cross multiply
    1,328,977.20x = 1,993,661.40 × 430,120.20
  4. Step 4: Simplify right side
    1,328,977.20x = 857,514,040,100.28
  5. Step 5: Solve for x
    x = 857,514,040,100.28/1,328,977.20
  6. Step 6: Final answer
    x = 645,243.61

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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.