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Finding the Fourth Proportional to 886,698.90, 1,330,376.40 and 287,679.60

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Solution

The fourth proportional to 886,698.90, 1,330,376.40 and 287,679.60 is: 431,625.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,698.90 : 1,330,376.40 = 287,679.60 : x
  2. Step 2: Convert to fraction form
    886,698.90/1,330,376.40 = 287,679.60/x
  3. Step 3: Cross multiply
    886,698.90x = 1,330,376.40 × 287,679.60
  4. Step 4: Simplify right side
    886,698.90x = 382,722,150,601.44
  5. Step 5: Solve for x
    x = 382,722,150,601.44/886,698.90
  6. Step 6: Final answer
    x = 431,625.83

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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.