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Finding the Fourth Proportional to 438,608.07, 605,379.12 and 285,375.93

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Solution

The fourth proportional to 438,608.07, 605,379.12 and 285,375.93 is: 393,883.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,608.07 : 605,379.12 = 285,375.93 : x
  2. Step 2: Convert to fraction form
    438,608.07/605,379.12 = 285,375.93/x
  3. Step 3: Cross multiply
    438,608.07x = 605,379.12 × 285,375.93
  4. Step 4: Simplify right side
    438,608.07x = 172,760,629,372.58
  5. Step 5: Solve for x
    x = 172,760,629,372.58/438,608.07
  6. Step 6: Final answer
    x = 393,883.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.