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Finding the Fourth Proportional to 388.86, 536.66 and 249.10

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Solution

The fourth proportional to 388.86, 536.66 and 249.10 is: 343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.86 : 536.66 = 249.10 : x
  2. Step 2: Convert to fraction form
    388.86/536.66 = 249.10/x
  3. Step 3: Cross multiply
    388.86x = 536.66 × 249.10
  4. Step 4: Simplify right side
    388.86x = 133,682.01
  5. Step 5: Solve for x
    x = 133,682.01/388.86
  6. Step 6: Final answer
    x = 343.78

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.