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Finding the Fourth Proportional to 354,990.52, 489,906.84 and 193,860.55

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Solution

The fourth proportional to 354,990.52, 489,906.84 and 193,860.55 is: 267,538.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,990.52 : 489,906.84 = 193,860.55 : x
  2. Step 2: Convert to fraction form
    354,990.52/489,906.84 = 193,860.55/x
  3. Step 3: Cross multiply
    354,990.52x = 489,906.84 × 193,860.55
  4. Step 4: Simplify right side
    354,990.52x = 94,973,609,451.16
  5. Step 5: Solve for x
    x = 94,973,609,451.16/354,990.52
  6. Step 6: Final answer
    x = 267,538.44

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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.