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Finding the Fourth Proportional to 235.91, 325.55 and 137.65

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Solution

The fourth proportional to 235.91, 325.55 and 137.65 is: 189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.91 : 325.55 = 137.65 : x
  2. Step 2: Convert to fraction form
    235.91/325.55 = 137.65/x
  3. Step 3: Cross multiply
    235.91x = 325.55 × 137.65
  4. Step 4: Simplify right side
    235.91x = 44,810.67
  5. Step 5: Solve for x
    x = 44,810.67/235.91
  6. Step 6: Final answer
    x = 189.95

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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.