Home / 3,979,801.80-5,969,678.40-1,139,919.12

Finding the Fourth Proportional to 3,979,801.80, 5,969,678.40 and 1,139,919.12

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Solution

The fourth proportional to 3,979,801.80, 5,969,678.40 and 1,139,919.12 is: 1,709,871.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979,801.80 : 5,969,678.40 = 1,139,919.12 : x
  2. Step 2: Convert to fraction form
    3,979,801.80/5,969,678.40 = 1,139,919.12/x
  3. Step 3: Cross multiply
    3,979,801.80x = 5,969,678.40 × 1,139,919.12
  4. Step 4: Simplify right side
    3,979,801.80x = 6,804,950,548,411.01
  5. Step 5: Solve for x
    x = 6,804,950,548,411.01/3,979,801.80
  6. Step 6: Final answer
    x = 1,709,871.72

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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.