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Finding the Fourth Proportional to 235.57, 325.07 and 137.31

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Solution

The fourth proportional to 235.57, 325.07 and 137.31 is: 189.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.57 : 325.07 = 137.31 : x
  2. Step 2: Convert to fraction form
    235.57/325.07 = 137.31/x
  3. Step 3: Cross multiply
    235.57x = 325.07 × 137.31
  4. Step 4: Simplify right side
    235.57x = 44,635.36
  5. Step 5: Solve for x
    x = 44,635.36/235.57
  6. Step 6: Final answer
    x = 189.48

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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.