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Finding the Fourth Proportional to 318.77, 439.88 and 192.73

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Solution

The fourth proportional to 318.77, 439.88 and 192.73 is: 265.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.77 : 439.88 = 192.73 : x
  2. Step 2: Convert to fraction form
    318.77/439.88 = 192.73/x
  3. Step 3: Cross multiply
    318.77x = 439.88 × 192.73
  4. Step 4: Simplify right side
    318.77x = 84,776.01
  5. Step 5: Solve for x
    x = 84,776.01/318.77
  6. Step 6: Final answer
    x = 265.95

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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.