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Finding the Fourth Proportional to 484.60, 668.82 and 310.45

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Solution

The fourth proportional to 484.60, 668.82 and 310.45 is: 428.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.60 : 668.82 = 310.45 : x
  2. Step 2: Convert to fraction form
    484.60/668.82 = 310.45/x
  3. Step 3: Cross multiply
    484.60x = 668.82 × 310.45
  4. Step 4: Simplify right side
    484.60x = 207,635.68
  5. Step 5: Solve for x
    x = 207,635.68/484.60
  6. Step 6: Final answer
    x = 428.47

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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.