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Finding the Fourth Proportional to 380,718.48, 525,380.10 and 208,634.40

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Solution

The fourth proportional to 380,718.48, 525,380.10 and 208,634.40 is: 287,909.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,718.48 : 525,380.10 = 208,634.40 : x
  2. Step 2: Convert to fraction form
    380,718.48/525,380.10 = 208,634.40/x
  3. Step 3: Cross multiply
    380,718.48x = 525,380.10 × 208,634.40
  4. Step 4: Simplify right side
    380,718.48x = 109,612,361,935.44
  5. Step 5: Solve for x
    x = 109,612,361,935.44/380,718.48
  6. Step 6: Final answer
    x = 287,909.22

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