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Finding the Fourth Proportional to 563.76, 777.72 and 486

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Solution

The fourth proportional to 563.76, 777.72 and 486 is: 670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.76 : 777.72 = 486 : x
  2. Step 2: Convert to fraction form
    563.76/777.72 = 486/x
  3. Step 3: Cross multiply
    563.76x = 777.72 × 486
  4. Step 4: Simplify right side
    563.76x = 377,971.92
  5. Step 5: Solve for x
    x = 377,971.92/563.76
  6. Step 6: Final answer
    x = 670.45

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