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Finding the Fourth Proportional to 421,997.80, 582,628.74 and 376,597.96

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Solution

The fourth proportional to 421,997.80, 582,628.74 and 376,597.96 is: 519,947.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,997.80 : 582,628.74 = 376,597.96 : x
  2. Step 2: Convert to fraction form
    421,997.80/582,628.74 = 376,597.96/x
  3. Step 3: Cross multiply
    421,997.80x = 582,628.74 × 376,597.96
  4. Step 4: Simplify right side
    421,997.80x = 219,416,794,921.37
  5. Step 5: Solve for x
    x = 219,416,794,921.37/421,997.80
  6. Step 6: Final answer
    x = 519,947.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.