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Finding the Fourth Proportional to 454,457.80, 681,680.30 and 205,139.40

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Solution

The fourth proportional to 454,457.80, 681,680.30 and 205,139.40 is: 307,706.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,457.80 : 681,680.30 = 205,139.40 : x
  2. Step 2: Convert to fraction form
    454,457.80/681,680.30 = 205,139.40/x
  3. Step 3: Cross multiply
    454,457.80x = 681,680.30 × 205,139.40
  4. Step 4: Simplify right side
    454,457.80x = 139,839,487,733.82
  5. Step 5: Solve for x
    x = 139,839,487,733.82/454,457.80
  6. Step 6: Final answer
    x = 307,706.21

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