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Finding the Fourth Proportional to 338.37, 508.28 and 242.79

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Solution

The fourth proportional to 338.37, 508.28 and 242.79 is: 364.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.37 : 508.28 = 242.79 : x
  2. Step 2: Convert to fraction form
    338.37/508.28 = 242.79/x
  3. Step 3: Cross multiply
    338.37x = 508.28 × 242.79
  4. Step 4: Simplify right side
    338.37x = 123,404.09
  5. Step 5: Solve for x
    x = 123,404.09/338.37
  6. Step 6: Final answer
    x = 364.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.