Home / 3,989,431.20-5,986,090.80-1,858,418.40

Finding the Fourth Proportional to 3,989,431.20, 5,986,090.80 and 1,858,418.40

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Solution

The fourth proportional to 3,989,431.20, 5,986,090.80 and 1,858,418.40 is: 2,788,533.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989,431.20 : 5,986,090.80 = 1,858,418.40 : x
  2. Step 2: Convert to fraction form
    3,989,431.20/5,986,090.80 = 1,858,418.40/x
  3. Step 3: Cross multiply
    3,989,431.20x = 5,986,090.80 × 1,858,418.40
  4. Step 4: Simplify right side
    3,989,431.20x = 11,124,661,286,790.72
  5. Step 5: Solve for x
    x = 11,124,661,286,790.72/3,989,431.20
  6. Step 6: Final answer
    x = 2,788,533.18

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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.