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Finding the Fourth Proportional to 451.81, 677.80 and 143.58

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Solution

The fourth proportional to 451.81, 677.80 and 143.58 is: 215.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.81 : 677.80 = 143.58 : x
  2. Step 2: Convert to fraction form
    451.81/677.80 = 143.58/x
  3. Step 3: Cross multiply
    451.81x = 677.80 × 143.58
  4. Step 4: Simplify right side
    451.81x = 97,318.52
  5. Step 5: Solve for x
    x = 97,318.52/451.81
  6. Step 6: Final answer
    x = 215.40

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