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Finding the Fourth Proportional to 484.58, 668.83 and 318.81

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Solution

The fourth proportional to 484.58, 668.83 and 318.81 is: 440.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.58 : 668.83 = 318.81 : x
  2. Step 2: Convert to fraction form
    484.58/668.83 = 318.81/x
  3. Step 3: Cross multiply
    484.58x = 668.83 × 318.81
  4. Step 4: Simplify right side
    484.58x = 213,228.90
  5. Step 5: Solve for x
    x = 213,228.90/484.58
  6. Step 6: Final answer
    x = 440.03

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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.