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Finding the Fourth Proportional to 452.43, 678.77 and 127.80

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Solution

The fourth proportional to 452.43, 678.77 and 127.80 is: 191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.43 : 678.77 = 127.80 : x
  2. Step 2: Convert to fraction form
    452.43/678.77 = 127.80/x
  3. Step 3: Cross multiply
    452.43x = 678.77 × 127.80
  4. Step 4: Simplify right side
    452.43x = 86,746.81
  5. Step 5: Solve for x
    x = 86,746.81/452.43
  6. Step 6: Final answer
    x = 191.74

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