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Finding the Fourth Proportional to 626,129.34, 863,783.10 and 422,105.73

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Solution

The fourth proportional to 626,129.34, 863,783.10 and 422,105.73 is: 582,320.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,129.34 : 863,783.10 = 422,105.73 : x
  2. Step 2: Convert to fraction form
    626,129.34/863,783.10 = 422,105.73/x
  3. Step 3: Cross multiply
    626,129.34x = 863,783.10 × 422,105.73
  4. Step 4: Simplify right side
    626,129.34x = 364,607,795,987.16
  5. Step 5: Solve for x
    x = 364,607,795,987.16/626,129.34
  6. Step 6: Final answer
    x = 582,320.25

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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.