Home / 1,378,577.20-2,067,930.60-431,978.80

Finding the Fourth Proportional to 1,378,577.20, 2,067,930.60 and 431,978.80

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Solution

The fourth proportional to 1,378,577.20, 2,067,930.60 and 431,978.80 is: 647,988.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,577.20 : 2,067,930.60 = 431,978.80 : x
  2. Step 2: Convert to fraction form
    1,378,577.20/2,067,930.60 = 431,978.80/x
  3. Step 3: Cross multiply
    1,378,577.20x = 2,067,930.60 × 431,978.80
  4. Step 4: Simplify right side
    1,378,577.20x = 893,302,179,071.28
  5. Step 5: Solve for x
    x = 893,302,179,071.28/1,378,577.20
  6. Step 6: Final answer
    x = 647,988.51

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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.