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Finding the Fourth Proportional to 418,855.80, 628,646.46 and 219,315.72

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Solution

The fourth proportional to 418,855.80, 628,646.46 and 219,315.72 is: 329,163.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,855.80 : 628,646.46 = 219,315.72 : x
  2. Step 2: Convert to fraction form
    418,855.80/628,646.46 = 219,315.72/x
  3. Step 3: Cross multiply
    418,855.80x = 628,646.46 × 219,315.72
  4. Step 4: Simplify right side
    418,855.80x = 137,872,051,000.35
  5. Step 5: Solve for x
    x = 137,872,051,000.35/418,855.80
  6. Step 6: Final answer
    x = 329,163.52

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