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Finding the Fourth Proportional to 327,645.87, 491,469 and 90,988.56

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Solution

The fourth proportional to 327,645.87, 491,469 and 90,988.56 is: 136,482.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,645.87 : 491,469 = 90,988.56 : x
  2. Step 2: Convert to fraction form
    327,645.87/491,469 = 90,988.56/x
  3. Step 3: Cross multiply
    327,645.87x = 491,469 × 90,988.56
  4. Step 4: Simplify right side
    327,645.87x = 44,718,056,594.64
  5. Step 5: Solve for x
    x = 44,718,056,594.64/327,645.87
  6. Step 6: Final answer
    x = 136,482.89

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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.