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Finding the Fourth Proportional to 419.10, 628.75 and 245.91

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Solution

The fourth proportional to 419.10, 628.75 and 245.91 is: 368.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.10 : 628.75 = 245.91 : x
  2. Step 2: Convert to fraction form
    419.10/628.75 = 245.91/x
  3. Step 3: Cross multiply
    419.10x = 628.75 × 245.91
  4. Step 4: Simplify right side
    419.10x = 154,612.94
  5. Step 5: Solve for x
    x = 154,612.94/419.10
  6. Step 6: Final answer
    x = 368.92

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