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Finding the Fourth Proportional to 484.08, 668.10 and 318.54

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Solution

The fourth proportional to 484.08, 668.10 and 318.54 is: 439.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.08 : 668.10 = 318.54 : x
  2. Step 2: Convert to fraction form
    484.08/668.10 = 318.54/x
  3. Step 3: Cross multiply
    484.08x = 668.10 × 318.54
  4. Step 4: Simplify right side
    484.08x = 212,816.57
  5. Step 5: Solve for x
    x = 212,816.57/484.08
  6. Step 6: Final answer
    x = 439.63

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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.