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Finding the Fourth Proportional to 471.64, 706.38 and 445

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Solution

The fourth proportional to 471.64, 706.38 and 445 is: 666.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.64 : 706.38 = 445 : x
  2. Step 2: Convert to fraction form
    471.64/706.38 = 445/x
  3. Step 3: Cross multiply
    471.64x = 706.38 × 445
  4. Step 4: Simplify right side
    471.64x = 314,339.10
  5. Step 5: Solve for x
    x = 314,339.10/471.64
  6. Step 6: Final answer
    x = 666.48

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