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Finding the Fourth Proportional to 858,698.60, 1,288,687.80 and 327,257.60

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Solution

The fourth proportional to 858,698.60, 1,288,687.80 and 327,257.60 is: 491,130.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,698.60 : 1,288,687.80 = 327,257.60 : x
  2. Step 2: Convert to fraction form
    858,698.60/1,288,687.80 = 327,257.60/x
  3. Step 3: Cross multiply
    858,698.60x = 1,288,687.80 × 327,257.60
  4. Step 4: Simplify right side
    858,698.60x = 421,732,876,577.28
  5. Step 5: Solve for x
    x = 421,732,876,577.28/858,698.60
  6. Step 6: Final answer
    x = 491,130.27

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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.