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Finding the Fourth Proportional to 556.72, 768.30 and 323.92

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Solution

The fourth proportional to 556.72, 768.30 and 323.92 is: 447.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.72 : 768.30 = 323.92 : x
  2. Step 2: Convert to fraction form
    556.72/768.30 = 323.92/x
  3. Step 3: Cross multiply
    556.72x = 768.30 × 323.92
  4. Step 4: Simplify right side
    556.72x = 248,867.74
  5. Step 5: Solve for x
    x = 248,867.74/556.72
  6. Step 6: Final answer
    x = 447.02

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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.