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Finding the Fourth Proportional to 465.04, 641.88 and 309.84

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Solution

The fourth proportional to 465.04, 641.88 and 309.84 is: 427.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.04 : 641.88 = 309.84 : x
  2. Step 2: Convert to fraction form
    465.04/641.88 = 309.84/x
  3. Step 3: Cross multiply
    465.04x = 641.88 × 309.84
  4. Step 4: Simplify right side
    465.04x = 198,880.10
  5. Step 5: Solve for x
    x = 198,880.10/465.04
  6. Step 6: Final answer
    x = 427.66

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