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Finding the Fourth Proportional to 612.04, 917.28 and 286.69

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Solution

The fourth proportional to 612.04, 917.28 and 286.69 is: 429.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.04 : 917.28 = 286.69 : x
  2. Step 2: Convert to fraction form
    612.04/917.28 = 286.69/x
  3. Step 3: Cross multiply
    612.04x = 917.28 × 286.69
  4. Step 4: Simplify right side
    612.04x = 262,975.00
  5. Step 5: Solve for x
    x = 262,975.00/612.04
  6. Step 6: Final answer
    x = 429.67

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