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Finding the Fourth Proportional to 388.84, 536.86 and 249.05

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Solution

The fourth proportional to 388.84, 536.86 and 249.05 is: 343.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.84 : 536.86 = 249.05 : x
  2. Step 2: Convert to fraction form
    388.84/536.86 = 249.05/x
  3. Step 3: Cross multiply
    388.84x = 536.86 × 249.05
  4. Step 4: Simplify right side
    388.84x = 133,704.98
  5. Step 5: Solve for x
    x = 133,704.98/388.84
  6. Step 6: Final answer
    x = 343.86

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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.