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Finding the Fourth Proportional to 518.21, 777.32 and 210

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Solution

The fourth proportional to 518.21, 777.32 and 210 is: 315.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.21 : 777.32 = 210 : x
  2. Step 2: Convert to fraction form
    518.21/777.32 = 210/x
  3. Step 3: Cross multiply
    518.21x = 777.32 × 210
  4. Step 4: Simplify right side
    518.21x = 163,237.20
  5. Step 5: Solve for x
    x = 163,237.20/518.21
  6. Step 6: Final answer
    x = 315.00

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