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Finding the Fourth Proportional to 480.62, 720.75 and 206.57

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Solution

The fourth proportional to 480.62, 720.75 and 206.57 is: 309.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.62 : 720.75 = 206.57 : x
  2. Step 2: Convert to fraction form
    480.62/720.75 = 206.57/x
  3. Step 3: Cross multiply
    480.62x = 720.75 × 206.57
  4. Step 4: Simplify right side
    480.62x = 148,885.33
  5. Step 5: Solve for x
    x = 148,885.33/480.62
  6. Step 6: Final answer
    x = 309.78

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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.