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Finding the Fourth Proportional to 619.20, 928.53 and 310.86

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Solution

The fourth proportional to 619.20, 928.53 and 310.86 is: 466.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.20 : 928.53 = 310.86 : x
  2. Step 2: Convert to fraction form
    619.20/928.53 = 310.86/x
  3. Step 3: Cross multiply
    619.20x = 928.53 × 310.86
  4. Step 4: Simplify right side
    619.20x = 288,642.84
  5. Step 5: Solve for x
    x = 288,642.84/619.20
  6. Step 6: Final answer
    x = 466.15

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