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Finding the Fourth Proportional to 556.28, 767.79 and 323.54

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Solution

The fourth proportional to 556.28, 767.79 and 323.54 is: 446.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.28 : 767.79 = 323.54 : x
  2. Step 2: Convert to fraction form
    556.28/767.79 = 323.54/x
  3. Step 3: Cross multiply
    556.28x = 767.79 × 323.54
  4. Step 4: Simplify right side
    556.28x = 248,410.78
  5. Step 5: Solve for x
    x = 248,410.78/556.28
  6. Step 6: Final answer
    x = 446.56

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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.