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Finding the Fourth Proportional to 428,652,002.70, 642,978,004.05 and 425,628,693.90

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Solution

The fourth proportional to 428,652,002.70, 642,978,004.05 and 425,628,693.90 is: 638,443,040.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,652,002.70 : 642,978,004.05 = 425,628,693.90 : x
  2. Step 2: Convert to fraction form
    428,652,002.70/642,978,004.05 = 425,628,693.90/x
  3. Step 3: Cross multiply
    428,652,002.70x = 642,978,004.05 × 425,628,693.90
  4. Step 4: Simplify right side
    428,652,002.70x = 273,669,888,070,230,368
  5. Step 5: Solve for x
    x = 273,669,888,070,230,368/428,652,002.70
  6. Step 6: Final answer
    x = 638,443,040.85

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Why These Related Problems?

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