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Finding the Fourth Proportional to 245.55, 338.91 and 140.65

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Solution

The fourth proportional to 245.55, 338.91 and 140.65 is: 194.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.55 : 338.91 = 140.65 : x
  2. Step 2: Convert to fraction form
    245.55/338.91 = 140.65/x
  3. Step 3: Cross multiply
    245.55x = 338.91 × 140.65
  4. Step 4: Simplify right side
    245.55x = 47,668.62
  5. Step 5: Solve for x
    x = 47,668.62/245.55
  6. Step 6: Final answer
    x = 194.13

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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.