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Finding the Fourth Proportional to 261.93, 393.05 and 247.86

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Solution

The fourth proportional to 261.93, 393.05 and 247.86 is: 371.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.93 : 393.05 = 247.86 : x
  2. Step 2: Convert to fraction form
    261.93/393.05 = 247.86/x
  3. Step 3: Cross multiply
    261.93x = 393.05 × 247.86
  4. Step 4: Simplify right side
    261.93x = 97,421.99
  5. Step 5: Solve for x
    x = 97,421.99/261.93
  6. Step 6: Final answer
    x = 371.93

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