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Finding the Fourth Proportional to 388.99, 536.50 and 254.12

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Solution

The fourth proportional to 388.99, 536.50 and 254.12 is: 350.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.99 : 536.50 = 254.12 : x
  2. Step 2: Convert to fraction form
    388.99/536.50 = 254.12/x
  3. Step 3: Cross multiply
    388.99x = 536.50 × 254.12
  4. Step 4: Simplify right side
    388.99x = 136,336.09
  5. Step 5: Solve for x
    x = 136,336.09/388.99
  6. Step 6: Final answer
    x = 350.49

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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.