Home / 1,261,919.60-1,893,180.72-420,478.64

Finding the Fourth Proportional to 1,261,919.60, 1,893,180.72 and 420,478.64

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Solution

The fourth proportional to 1,261,919.60, 1,893,180.72 and 420,478.64 is: 630,818.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,919.60 : 1,893,180.72 = 420,478.64 : x
  2. Step 2: Convert to fraction form
    1,261,919.60/1,893,180.72 = 420,478.64/x
  3. Step 3: Cross multiply
    1,261,919.60x = 1,893,180.72 × 420,478.64
  4. Step 4: Simplify right side
    1,261,919.60x = 796,042,054,419.82
  5. Step 5: Solve for x
    x = 796,042,054,419.82/1,261,919.60
  6. Step 6: Final answer
    x = 630,818.36

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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.