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Finding the Fourth Proportional to 354,960.72, 489,865.68 and 193,830.80

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Solution

The fourth proportional to 354,960.72, 489,865.68 and 193,830.80 is: 267,497.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,960.72 : 489,865.68 = 193,830.80 : x
  2. Step 2: Convert to fraction form
    354,960.72/489,865.68 = 193,830.80/x
  3. Step 3: Cross multiply
    354,960.72x = 489,865.68 × 193,830.80
  4. Step 4: Simplify right side
    354,960.72x = 94,951,056,646.94
  5. Step 5: Solve for x
    x = 94,951,056,646.94/354,960.72
  6. Step 6: Final answer
    x = 267,497.36

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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.