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Finding the Fourth Proportional to 479.61, 718.70 and 316.71

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Solution

The fourth proportional to 479.61, 718.70 and 316.71 is: 474.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.61 : 718.70 = 316.71 : x
  2. Step 2: Convert to fraction form
    479.61/718.70 = 316.71/x
  3. Step 3: Cross multiply
    479.61x = 718.70 × 316.71
  4. Step 4: Simplify right side
    479.61x = 227,617.89
  5. Step 5: Solve for x
    x = 227,617.89/479.61
  6. Step 6: Final answer
    x = 474.59

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