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Finding the Fourth Proportional to 235.74, 325.28 and 137.49

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Solution

The fourth proportional to 235.74, 325.28 and 137.49 is: 189.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.74 : 325.28 = 137.49 : x
  2. Step 2: Convert to fraction form
    235.74/325.28 = 137.49/x
  3. Step 3: Cross multiply
    235.74x = 325.28 × 137.49
  4. Step 4: Simplify right side
    235.74x = 44,723.56
  5. Step 5: Solve for x
    x = 44,723.56/235.74
  6. Step 6: Final answer
    x = 189.72

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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.