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Finding the Fourth Proportional to 230.49, 318.04 and 137.23

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Solution

The fourth proportional to 230.49, 318.04 and 137.23 is: 189.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.49 : 318.04 = 137.23 : x
  2. Step 2: Convert to fraction form
    230.49/318.04 = 137.23/x
  3. Step 3: Cross multiply
    230.49x = 318.04 × 137.23
  4. Step 4: Simplify right side
    230.49x = 43,643.94
  5. Step 5: Solve for x
    x = 43,643.94/230.49
  6. Step 6: Final answer
    x = 189.35

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Why These Related Problems?

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