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Finding the Fourth Proportional to 484.80, 727.88 and 320.31

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Solution

The fourth proportional to 484.80, 727.88 and 320.31 is: 480.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.80 : 727.88 = 320.31 : x
  2. Step 2: Convert to fraction form
    484.80/727.88 = 320.31/x
  3. Step 3: Cross multiply
    484.80x = 727.88 × 320.31
  4. Step 4: Simplify right side
    484.80x = 233,145.64
  5. Step 5: Solve for x
    x = 233,145.64/484.80
  6. Step 6: Final answer
    x = 480.91

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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.