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Finding the Fourth Proportional to 392.52, 587.76 and 315.06

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Solution

The fourth proportional to 392.52, 587.76 and 315.06 is: 471.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.52 : 587.76 = 315.06 : x
  2. Step 2: Convert to fraction form
    392.52/587.76 = 315.06/x
  3. Step 3: Cross multiply
    392.52x = 587.76 × 315.06
  4. Step 4: Simplify right side
    392.52x = 185,181.24
  5. Step 5: Solve for x
    x = 185,181.24/392.52
  6. Step 6: Final answer
    x = 471.77

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