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Finding the Fourth Proportional to 484.79, 727.39 and 311.55

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Solution

The fourth proportional to 484.79, 727.39 and 311.55 is: 467.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.79 : 727.39 = 311.55 : x
  2. Step 2: Convert to fraction form
    484.79/727.39 = 311.55/x
  3. Step 3: Cross multiply
    484.79x = 727.39 × 311.55
  4. Step 4: Simplify right side
    484.79x = 226,618.35
  5. Step 5: Solve for x
    x = 226,618.35/484.79
  6. Step 6: Final answer
    x = 467.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.