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Finding the Fourth Proportional to 480.70, 663.45 and 281.55

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Solution

The fourth proportional to 480.70, 663.45 and 281.55 is: 388.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.70 : 663.45 = 281.55 : x
  2. Step 2: Convert to fraction form
    480.70/663.45 = 281.55/x
  3. Step 3: Cross multiply
    480.70x = 663.45 × 281.55
  4. Step 4: Simplify right side
    480.70x = 186,794.35
  5. Step 5: Solve for x
    x = 186,794.35/480.70
  6. Step 6: Final answer
    x = 388.59

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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.