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Finding the Fourth Proportional to 325,685.79, 489,279.56 and 312,233.85

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Solution

The fourth proportional to 325,685.79, 489,279.56 and 312,233.85 is: 469,070.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,685.79 : 489,279.56 = 312,233.85 : x
  2. Step 2: Convert to fraction form
    325,685.79/489,279.56 = 312,233.85/x
  3. Step 3: Cross multiply
    325,685.79x = 489,279.56 × 312,233.85
  4. Step 4: Simplify right side
    325,685.79x = 152,769,639,183.94
  5. Step 5: Solve for x
    x = 152,769,639,183.94/325,685.79
  6. Step 6: Final answer
    x = 469,070.63

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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.