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Finding the Fourth Proportional to 388.75, 536.52 and 272.56

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Solution

The fourth proportional to 388.75, 536.52 and 272.56 is: 376.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.75 : 536.52 = 272.56 : x
  2. Step 2: Convert to fraction form
    388.75/536.52 = 272.56/x
  3. Step 3: Cross multiply
    388.75x = 536.52 × 272.56
  4. Step 4: Simplify right side
    388.75x = 146,233.89
  5. Step 5: Solve for x
    x = 146,233.89/388.75
  6. Step 6: Final answer
    x = 376.16

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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.