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Finding the Fourth Proportional to 281,145.80, 421,815.90 and 271,425.80

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Solution

The fourth proportional to 281,145.80, 421,815.90 and 271,425.80 is: 407,232.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,145.80 : 421,815.90 = 271,425.80 : x
  2. Step 2: Convert to fraction form
    281,145.80/421,815.90 = 271,425.80/x
  3. Step 3: Cross multiply
    281,145.80x = 421,815.90 × 271,425.80
  4. Step 4: Simplify right side
    281,145.80x = 114,491,718,110.22
  5. Step 5: Solve for x
    x = 114,491,718,110.22/281,145.80
  6. Step 6: Final answer
    x = 407,232.54

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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.