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Finding the Fourth Proportional to 387.05, 579.62 and 270.95

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Solution

The fourth proportional to 387.05, 579.62 and 270.95 is: 405.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.05 : 579.62 = 270.95 : x
  2. Step 2: Convert to fraction form
    387.05/579.62 = 270.95/x
  3. Step 3: Cross multiply
    387.05x = 579.62 × 270.95
  4. Step 4: Simplify right side
    387.05x = 157,049.18
  5. Step 5: Solve for x
    x = 157,049.18/387.05
  6. Step 6: Final answer
    x = 405.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.