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Finding the Fourth Proportional to 521,978,449.86, 720,348,751.08 and 287,046,983.70

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Solution

The fourth proportional to 521,978,449.86, 720,348,751.08 and 287,046,983.70 is: 396,135,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,978,449.86 : 720,348,751.08 = 287,046,983.70 : x
  2. Step 2: Convert to fraction form
    521,978,449.86/720,348,751.08 = 287,046,983.70/x
  3. Step 3: Cross multiply
    521,978,449.86x = 720,348,751.08 × 287,046,983.70
  4. Step 4: Simplify right side
    521,978,449.86x = 206,773,936,209,576,128
  5. Step 5: Solve for x
    x = 206,773,936,209,576,128/521,978,449.86
  6. Step 6: Final answer
    x = 396,135,005.70

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Why These Related Problems?

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