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Finding the Fourth Proportional to 421,989.74, 582,617.43 and 376,589.73

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Solution

The fourth proportional to 421,989.74, 582,617.43 and 376,589.73 is: 519,936.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,989.74 : 582,617.43 = 376,589.73 : x
  2. Step 2: Convert to fraction form
    421,989.74/582,617.43 = 376,589.73/x
  3. Step 3: Cross multiply
    421,989.74x = 582,617.43 × 376,589.73
  4. Step 4: Simplify right side
    421,989.74x = 219,407,740,656.99
  5. Step 5: Solve for x
    x = 219,407,740,656.99/421,989.74
  6. Step 6: Final answer
    x = 519,936.20

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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.