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Finding the Fourth Proportional to 245.57, 338.47 and 158.09

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Solution

The fourth proportional to 245.57, 338.47 and 158.09 is: 217.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.57 : 338.47 = 158.09 : x
  2. Step 2: Convert to fraction form
    245.57/338.47 = 158.09/x
  3. Step 3: Cross multiply
    245.57x = 338.47 × 158.09
  4. Step 4: Simplify right side
    245.57x = 53,506.24
  5. Step 5: Solve for x
    x = 53,506.24/245.57
  6. Step 6: Final answer
    x = 217.89

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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.