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Finding the Fourth Proportional to 449.76, 620.72 and 310.08

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Solution

The fourth proportional to 449.76, 620.72 and 310.08 is: 427.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.76 : 620.72 = 310.08 : x
  2. Step 2: Convert to fraction form
    449.76/620.72 = 310.08/x
  3. Step 3: Cross multiply
    449.76x = 620.72 × 310.08
  4. Step 4: Simplify right side
    449.76x = 192,472.86
  5. Step 5: Solve for x
    x = 192,472.86/449.76
  6. Step 6: Final answer
    x = 427.95

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