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Finding the Fourth Proportional to 390.10, 584.66 and 341.24

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Solution

The fourth proportional to 390.10, 584.66 and 341.24 is: 511.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.10 : 584.66 = 341.24 : x
  2. Step 2: Convert to fraction form
    390.10/584.66 = 341.24/x
  3. Step 3: Cross multiply
    390.10x = 584.66 × 341.24
  4. Step 4: Simplify right side
    390.10x = 199,506.46
  5. Step 5: Solve for x
    x = 199,506.46/390.10
  6. Step 6: Final answer
    x = 511.42

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