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Finding the Fourth Proportional to 480.18, 662.78 and 283.75

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Solution

The fourth proportional to 480.18, 662.78 and 283.75 is: 391.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.18 : 662.78 = 283.75 : x
  2. Step 2: Convert to fraction form
    480.18/662.78 = 283.75/x
  3. Step 3: Cross multiply
    480.18x = 662.78 × 283.75
  4. Step 4: Simplify right side
    480.18x = 188,063.83
  5. Step 5: Solve for x
    x = 188,063.83/480.18
  6. Step 6: Final answer
    x = 391.65

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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.