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Finding the Fourth Proportional to 292.61, 438.59 and 211.80

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Solution

The fourth proportional to 292.61, 438.59 and 211.80 is: 317.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.61 : 438.59 = 211.80 : x
  2. Step 2: Convert to fraction form
    292.61/438.59 = 211.80/x
  3. Step 3: Cross multiply
    292.61x = 438.59 × 211.80
  4. Step 4: Simplify right side
    292.61x = 92,892.30
  5. Step 5: Solve for x
    x = 92,892.30/292.61
  6. Step 6: Final answer
    x = 317.47

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