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Finding the Fourth Proportional to 485.88, 728.94 and 197.52

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Solution

The fourth proportional to 485.88, 728.94 and 197.52 is: 296.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.88 : 728.94 = 197.52 : x
  2. Step 2: Convert to fraction form
    485.88/728.94 = 197.52/x
  3. Step 3: Cross multiply
    485.88x = 728.94 × 197.52
  4. Step 4: Simplify right side
    485.88x = 143,980.23
  5. Step 5: Solve for x
    x = 143,980.23/485.88
  6. Step 6: Final answer
    x = 296.33

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