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Finding the Fourth Proportional to 479.51, 661.64 and 283.08

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Solution

The fourth proportional to 479.51, 661.64 and 283.08 is: 390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.51 : 661.64 = 283.08 : x
  2. Step 2: Convert to fraction form
    479.51/661.64 = 283.08/x
  3. Step 3: Cross multiply
    479.51x = 661.64 × 283.08
  4. Step 4: Simplify right side
    479.51x = 187,295.64
  5. Step 5: Solve for x
    x = 187,295.64/479.51
  6. Step 6: Final answer
    x = 390.60

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