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Finding the Fourth Proportional to 556.48, 768 and 323.60

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Solution

The fourth proportional to 556.48, 768 and 323.60 is: 446.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.48 : 768 = 323.60 : x
  2. Step 2: Convert to fraction form
    556.48/768 = 323.60/x
  3. Step 3: Cross multiply
    556.48x = 768 × 323.60
  4. Step 4: Simplify right side
    556.48x = 248,524.80
  5. Step 5: Solve for x
    x = 248,524.80/556.48
  6. Step 6: Final answer
    x = 446.60

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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.