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Finding the Fourth Proportional to 607.92, 913.68 and 319.68

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Solution

The fourth proportional to 607.92, 913.68 and 319.68 is: 480.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.92 : 913.68 = 319.68 : x
  2. Step 2: Convert to fraction form
    607.92/913.68 = 319.68/x
  3. Step 3: Cross multiply
    607.92x = 913.68 × 319.68
  4. Step 4: Simplify right side
    607.92x = 292,085.22
  5. Step 5: Solve for x
    x = 292,085.22/607.92
  6. Step 6: Final answer
    x = 480.47

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