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Finding the Fourth Proportional to 245.27, 338.55 and 152.09

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Solution

The fourth proportional to 245.27, 338.55 and 152.09 is: 209.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.27 : 338.55 = 152.09 : x
  2. Step 2: Convert to fraction form
    245.27/338.55 = 152.09/x
  3. Step 3: Cross multiply
    245.27x = 338.55 × 152.09
  4. Step 4: Simplify right side
    245.27x = 51,488.38
  5. Step 5: Solve for x
    x = 51,488.38/245.27
  6. Step 6: Final answer
    x = 209.93

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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.