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Finding the Fourth Proportional to 397.19, 594.91 and 287.18

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Solution

The fourth proportional to 397.19, 594.91 and 287.18 is: 430.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.19 : 594.91 = 287.18 : x
  2. Step 2: Convert to fraction form
    397.19/594.91 = 287.18/x
  3. Step 3: Cross multiply
    397.19x = 594.91 × 287.18
  4. Step 4: Simplify right side
    397.19x = 170,845.87
  5. Step 5: Solve for x
    x = 170,845.87/397.19
  6. Step 6: Final answer
    x = 430.13

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