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Finding the Fourth Proportional to 480.30, 662.88 and 283.80

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Solution

The fourth proportional to 480.30, 662.88 and 283.80 is: 391.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.30 : 662.88 = 283.80 : x
  2. Step 2: Convert to fraction form
    480.30/662.88 = 283.80/x
  3. Step 3: Cross multiply
    480.30x = 662.88 × 283.80
  4. Step 4: Simplify right side
    480.30x = 188,125.34
  5. Step 5: Solve for x
    x = 188,125.34/480.30
  6. Step 6: Final answer
    x = 391.68

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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.