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Finding the Fourth Proportional to 387.39, 533.43 and 334.84

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Solution

The fourth proportional to 387.39, 533.43 and 334.84 is: 461.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.39 : 533.43 = 334.84 : x
  2. Step 2: Convert to fraction form
    387.39/533.43 = 334.84/x
  3. Step 3: Cross multiply
    387.39x = 533.43 × 334.84
  4. Step 4: Simplify right side
    387.39x = 178,613.70
  5. Step 5: Solve for x
    x = 178,613.70/387.39
  6. Step 6: Final answer
    x = 461.07

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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.