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Finding the Fourth Proportional to 640,109.40, 883,344.33 and 353,610.78

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Solution

The fourth proportional to 640,109.40, 883,344.33 and 353,610.78 is: 487,979.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,109.40 : 883,344.33 = 353,610.78 : x
  2. Step 2: Convert to fraction form
    640,109.40/883,344.33 = 353,610.78/x
  3. Step 3: Cross multiply
    640,109.40x = 883,344.33 × 353,610.78
  4. Step 4: Simplify right side
    640,109.40x = 312,360,077,539.88
  5. Step 5: Solve for x
    x = 312,360,077,539.88/640,109.40
  6. Step 6: Final answer
    x = 487,979.21

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