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Finding the Fourth Proportional to 389.28, 537.18 and 242

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Solution

The fourth proportional to 389.28, 537.18 and 242 is: 333.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.28 : 537.18 = 242 : x
  2. Step 2: Convert to fraction form
    389.28/537.18 = 242/x
  3. Step 3: Cross multiply
    389.28x = 537.18 × 242
  4. Step 4: Simplify right side
    389.28x = 129,997.56
  5. Step 5: Solve for x
    x = 129,997.56/389.28
  6. Step 6: Final answer
    x = 333.94

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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.