Home / 431,431.14-647,290.20-191,511.75

Finding the Fourth Proportional to 431,431.14, 647,290.20 and 191,511.75

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Solution

The fourth proportional to 431,431.14, 647,290.20 and 191,511.75 is: 287,331.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,431.14 : 647,290.20 = 191,511.75 : x
  2. Step 2: Convert to fraction form
    431,431.14/647,290.20 = 191,511.75/x
  3. Step 3: Cross multiply
    431,431.14x = 647,290.20 × 191,511.75
  4. Step 4: Simplify right side
    431,431.14x = 123,963,678,959.85
  5. Step 5: Solve for x
    x = 123,963,678,959.85/431,431.14
  6. Step 6: Final answer
    x = 287,331.32

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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.