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Finding the Fourth Proportional to 326,245.28, 489,037.28 and 221,074.88

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Solution

The fourth proportional to 326,245.28, 489,037.28 and 221,074.88 is: 331,388.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,245.28 : 489,037.28 = 221,074.88 : x
  2. Step 2: Convert to fraction form
    326,245.28/489,037.28 = 221,074.88/x
  3. Step 3: Cross multiply
    326,245.28x = 489,037.28 × 221,074.88
  4. Step 4: Simplify right side
    326,245.28x = 108,113,857,991.53
  5. Step 5: Solve for x
    x = 108,113,857,991.53/326,245.28
  6. Step 6: Final answer
    x = 331,388.27

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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.