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Finding the Fourth Proportional to 247.21, 338.93 and 242.82

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Solution

The fourth proportional to 247.21, 338.93 and 242.82 is: 332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.21 : 338.93 = 242.82 : x
  2. Step 2: Convert to fraction form
    247.21/338.93 = 242.82/x
  3. Step 3: Cross multiply
    247.21x = 338.93 × 242.82
  4. Step 4: Simplify right side
    247.21x = 82,298.98
  5. Step 5: Solve for x
    x = 82,298.98/247.21
  6. Step 6: Final answer
    x = 332.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.