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Finding the Fourth Proportional to 298,915.20, 447,716.70 and 259,549.20

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Solution

The fourth proportional to 298,915.20, 447,716.70 and 259,549.20 is: 388,754.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,915.20 : 447,716.70 = 259,549.20 : x
  2. Step 2: Convert to fraction form
    298,915.20/447,716.70 = 259,549.20/x
  3. Step 3: Cross multiply
    298,915.20x = 447,716.70 × 259,549.20
  4. Step 4: Simplify right side
    298,915.20x = 116,204,511,311.64
  5. Step 5: Solve for x
    x = 116,204,511,311.64/298,915.20
  6. Step 6: Final answer
    x = 388,754.11

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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.