Home / 1,328,781.80-1,993,489.48-430,223.81

Finding the Fourth Proportional to 1,328,781.80, 1,993,489.48 and 430,223.81

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Solution

The fourth proportional to 1,328,781.80, 1,993,489.48 and 430,223.81 is: 645,438.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,781.80 : 1,993,489.48 = 430,223.81 : x
  2. Step 2: Convert to fraction form
    1,328,781.80/1,993,489.48 = 430,223.81/x
  3. Step 3: Cross multiply
    1,328,781.80x = 1,993,489.48 × 430,223.81
  4. Step 4: Simplify right side
    1,328,781.80x = 857,646,629,850.85
  5. Step 5: Solve for x
    x = 857,646,629,850.85/1,328,781.80
  6. Step 6: Final answer
    x = 645,438.27

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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.