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Finding the Fourth Proportional to 393.77, 543.35 and 227.95

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Solution

The fourth proportional to 393.77, 543.35 and 227.95 is: 314.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.77 : 543.35 = 227.95 : x
  2. Step 2: Convert to fraction form
    393.77/543.35 = 227.95/x
  3. Step 3: Cross multiply
    393.77x = 543.35 × 227.95
  4. Step 4: Simplify right side
    393.77x = 123,857.88
  5. Step 5: Solve for x
    x = 123,857.88/393.77
  6. Step 6: Final answer
    x = 314.55

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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.