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Finding the Fourth Proportional to 388.54, 536.16 and 231.17

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Solution

The fourth proportional to 388.54, 536.16 and 231.17 is: 318.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.54 : 536.16 = 231.17 : x
  2. Step 2: Convert to fraction form
    388.54/536.16 = 231.17/x
  3. Step 3: Cross multiply
    388.54x = 536.16 × 231.17
  4. Step 4: Simplify right side
    388.54x = 123,941.43
  5. Step 5: Solve for x
    x = 123,941.43/388.54
  6. Step 6: Final answer
    x = 318.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.