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Finding the Fourth Proportional to 235.58, 325.20 and 137.31

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Solution

The fourth proportional to 235.58, 325.20 and 137.31 is: 189.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.58 : 325.20 = 137.31 : x
  2. Step 2: Convert to fraction form
    235.58/325.20 = 137.31/x
  3. Step 3: Cross multiply
    235.58x = 325.20 × 137.31
  4. Step 4: Simplify right side
    235.58x = 44,653.21
  5. Step 5: Solve for x
    x = 44,653.21/235.58
  6. Step 6: Final answer
    x = 189.55

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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.