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Finding the Fourth Proportional to 331,286.20, 496,929.30 and 308,978.80

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Solution

The fourth proportional to 331,286.20, 496,929.30 and 308,978.80 is: 463,468.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,286.20 : 496,929.30 = 308,978.80 : x
  2. Step 2: Convert to fraction form
    331,286.20/496,929.30 = 308,978.80/x
  3. Step 3: Cross multiply
    331,286.20x = 496,929.30 × 308,978.80
  4. Step 4: Simplify right side
    331,286.20x = 153,540,618,798.84
  5. Step 5: Solve for x
    x = 153,540,618,798.84/331,286.20
  6. Step 6: Final answer
    x = 463,468.20

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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.