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Finding the Fourth Proportional to 355,054.68, 489,978.18 and 193,906.80

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Solution

The fourth proportional to 355,054.68, 489,978.18 and 193,906.80 is: 267,592.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,054.68 : 489,978.18 = 193,906.80 : x
  2. Step 2: Convert to fraction form
    355,054.68/489,978.18 = 193,906.80/x
  3. Step 3: Cross multiply
    355,054.68x = 489,978.18 × 193,906.80
  4. Step 4: Simplify right side
    355,054.68x = 95,010,100,953.62
  5. Step 5: Solve for x
    x = 95,010,100,953.62/355,054.68
  6. Step 6: Final answer
    x = 267,592.87

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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.