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Finding the Fourth Proportional to 388.82, 535.20 and 333.50

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Solution

The fourth proportional to 388.82, 535.20 and 333.50 is: 459.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.82 : 535.20 = 333.50 : x
  2. Step 2: Convert to fraction form
    388.82/535.20 = 333.50/x
  3. Step 3: Cross multiply
    388.82x = 535.20 × 333.50
  4. Step 4: Simplify right side
    388.82x = 178,489.20
  5. Step 5: Solve for x
    x = 178,489.20/388.82
  6. Step 6: Final answer
    x = 459.05

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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.