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Finding the Fourth Proportional to 612,379.44, 916,603.83 and 327,357.45

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Solution

The fourth proportional to 612,379.44, 916,603.83 and 327,357.45 is: 489,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,379.44 : 916,603.83 = 327,357.45 : x
  2. Step 2: Convert to fraction form
    612,379.44/916,603.83 = 327,357.45/x
  3. Step 3: Cross multiply
    612,379.44x = 916,603.83 × 327,357.45
  4. Step 4: Simplify right side
    612,379.44x = 300,057,092,449.03
  5. Step 5: Solve for x
    x = 300,057,092,449.03/612,379.44
  6. Step 6: Final answer
    x = 489,985.58

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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.