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Finding the Fourth Proportional to 327,645.40, 491,443.80 and 138,056.80

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Solution

The fourth proportional to 327,645.40, 491,443.80 and 138,056.80 is: 207,074.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,645.40 : 491,443.80 = 138,056.80 : x
  2. Step 2: Convert to fraction form
    327,645.40/491,443.80 = 138,056.80/x
  3. Step 3: Cross multiply
    327,645.40x = 491,443.80 × 138,056.80
  4. Step 4: Simplify right side
    327,645.40x = 67,847,158,407.84
  5. Step 5: Solve for x
    x = 67,847,158,407.84/327,645.40
  6. Step 6: Final answer
    x = 207,074.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.