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Finding the Fourth Proportional to 551.16, 826.74 and 261.72

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Solution

The fourth proportional to 551.16, 826.74 and 261.72 is: 392.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.16 : 826.74 = 261.72 : x
  2. Step 2: Convert to fraction form
    551.16/826.74 = 261.72/x
  3. Step 3: Cross multiply
    551.16x = 826.74 × 261.72
  4. Step 4: Simplify right side
    551.16x = 216,374.39
  5. Step 5: Solve for x
    x = 216,374.39/551.16
  6. Step 6: Final answer
    x = 392.58

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