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Finding the Fourth Proportional to 355,006.80, 489,912.10 and 202,056.73

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Solution

The fourth proportional to 355,006.80, 489,912.10 and 202,056.73 is: 278,839.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,006.80 : 489,912.10 = 202,056.73 : x
  2. Step 2: Convert to fraction form
    355,006.80/489,912.10 = 202,056.73/x
  3. Step 3: Cross multiply
    355,006.80x = 489,912.10 × 202,056.73
  4. Step 4: Simplify right side
    355,006.80x = 98,990,035,183.51
  5. Step 5: Solve for x
    x = 98,990,035,183.51/355,006.80
  6. Step 6: Final answer
    x = 278,839.83

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1.5x scale

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.