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Finding the Fourth Proportional to 388.39, 534.81 and 335.84

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Solution

The fourth proportional to 388.39, 534.81 and 335.84 is: 462.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.39 : 534.81 = 335.84 : x
  2. Step 2: Convert to fraction form
    388.39/534.81 = 335.84/x
  3. Step 3: Cross multiply
    388.39x = 534.81 × 335.84
  4. Step 4: Simplify right side
    388.39x = 179,610.59
  5. Step 5: Solve for x
    x = 179,610.59/388.39
  6. Step 6: Final answer
    x = 462.45

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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.