Home / 1,288,172.21-1,932,561.77-389,621.39

Finding the Fourth Proportional to 1,288,172.21, 1,932,561.77 and 389,621.39

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Solution

The fourth proportional to 1,288,172.21, 1,932,561.77 and 389,621.39 is: 584,523.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,172.21 : 1,932,561.77 = 389,621.39 : x
  2. Step 2: Convert to fraction form
    1,288,172.21/1,932,561.77 = 389,621.39/x
  3. Step 3: Cross multiply
    1,288,172.21x = 1,932,561.77 × 389,621.39
  4. Step 4: Simplify right side
    1,288,172.21x = 752,967,405,971.56
  5. Step 5: Solve for x
    x = 752,967,405,971.56/1,288,172.21
  6. Step 6: Final answer
    x = 584,523.87

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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.