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Finding the Fourth Proportional to 428,652,003.70, 642,978,005.55 and 425,628,694.90

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Solution

The fourth proportional to 428,652,003.70, 642,978,005.55 and 425,628,694.90 is: 638,443,042.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,652,003.70 : 642,978,005.55 = 425,628,694.90 : x
  2. Step 2: Convert to fraction form
    428,652,003.70/642,978,005.55 = 425,628,694.90/x
  3. Step 3: Cross multiply
    428,652,003.70x = 642,978,005.55 × 425,628,694.90
  4. Step 4: Simplify right side
    428,652,003.70x = 273,669,889,351,651,424
  5. Step 5: Solve for x
    x = 273,669,889,351,651,424/428,652,003.70
  6. Step 6: Final answer
    x = 638,443,042.35

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Why These Related Problems?

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