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Finding the Fourth Proportional to 485.31, 728.48 and 302.84

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Solution

The fourth proportional to 485.31, 728.48 and 302.84 is: 454.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.31 : 728.48 = 302.84 : x
  2. Step 2: Convert to fraction form
    485.31/728.48 = 302.84/x
  3. Step 3: Cross multiply
    485.31x = 728.48 × 302.84
  4. Step 4: Simplify right side
    485.31x = 220,609.24
  5. Step 5: Solve for x
    x = 220,609.24/485.31
  6. Step 6: Final answer
    x = 454.57

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