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Finding the Fourth Proportional to 331,285.70, 496,928.55 and 308,978.30

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Solution

The fourth proportional to 331,285.70, 496,928.55 and 308,978.30 is: 463,467.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,285.70 : 496,928.55 = 308,978.30 : x
  2. Step 2: Convert to fraction form
    331,285.70/496,928.55 = 308,978.30/x
  3. Step 3: Cross multiply
    331,285.70x = 496,928.55 × 308,978.30
  4. Step 4: Simplify right side
    331,285.70x = 153,540,138,600.47
  5. Step 5: Solve for x
    x = 153,540,138,600.47/331,285.70
  6. Step 6: Final answer
    x = 463,467.45

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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.