Home / 1,385,642.80-2,078,464.20-851,431.60

Finding the Fourth Proportional to 1,385,642.80, 2,078,464.20 and 851,431.60

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Solution

The fourth proportional to 1,385,642.80, 2,078,464.20 and 851,431.60 is: 1,277,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,642.80 : 2,078,464.20 = 851,431.60 : x
  2. Step 2: Convert to fraction form
    1,385,642.80/2,078,464.20 = 851,431.60/x
  3. Step 3: Cross multiply
    1,385,642.80x = 2,078,464.20 × 851,431.60
  4. Step 4: Simplify right side
    1,385,642.80x = 1,769,670,099,348.72
  5. Step 5: Solve for x
    x = 1,769,670,099,348.72/1,385,642.80
  6. Step 6: Final answer
    x = 1,277,147.40

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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.