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Finding the Fourth Proportional to 272.64, 409 and 99.32

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Solution

The fourth proportional to 272.64, 409 and 99.32 is: 148.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.64 : 409 = 99.32 : x
  2. Step 2: Convert to fraction form
    272.64/409 = 99.32/x
  3. Step 3: Cross multiply
    272.64x = 409 × 99.32
  4. Step 4: Simplify right side
    272.64x = 40,621.88
  5. Step 5: Solve for x
    x = 40,621.88/272.64
  6. Step 6: Final answer
    x = 148.99

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