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Finding the Fourth Proportional to 628.48, 867 and 407.16

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Solution

The fourth proportional to 628.48, 867 and 407.16 is: 561.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.48 : 867 = 407.16 : x
  2. Step 2: Convert to fraction form
    628.48/867 = 407.16/x
  3. Step 3: Cross multiply
    628.48x = 867 × 407.16
  4. Step 4: Simplify right side
    628.48x = 353,007.72
  5. Step 5: Solve for x
    x = 353,007.72/628.48
  6. Step 6: Final answer
    x = 561.68

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