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Finding the Fourth Proportional to 489,626.88, 675,689.76 and 285,804.96

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Solution

The fourth proportional to 489,626.88, 675,689.76 and 285,804.96 is: 394,413.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,626.88 : 675,689.76 = 285,804.96 : x
  2. Step 2: Convert to fraction form
    489,626.88/675,689.76 = 285,804.96/x
  3. Step 3: Cross multiply
    489,626.88x = 675,689.76 × 285,804.96
  4. Step 4: Simplify right side
    489,626.88x = 193,115,484,829.21
  5. Step 5: Solve for x
    x = 193,115,484,829.21/489,626.88
  6. Step 6: Final answer
    x = 394,413.57

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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.