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Finding the Fourth Proportional to 354,909.59, 489,782.66 and 193,771.43

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Solution

The fourth proportional to 354,909.59, 489,782.66 and 193,771.43 is: 267,408.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,909.59 : 489,782.66 = 193,771.43 : x
  2. Step 2: Convert to fraction form
    354,909.59/489,782.66 = 193,771.43/x
  3. Step 3: Cross multiply
    354,909.59x = 489,782.66 × 193,771.43
  4. Step 4: Simplify right side
    354,909.59x = 94,905,882,999.63
  5. Step 5: Solve for x
    x = 94,905,882,999.63/354,909.59
  6. Step 6: Final answer
    x = 267,408.62

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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.