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Finding the Fourth Proportional to 480.96, 663.66 and 284.40

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Solution

The fourth proportional to 480.96, 663.66 and 284.40 is: 392.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.96 : 663.66 = 284.40 : x
  2. Step 2: Convert to fraction form
    480.96/663.66 = 284.40/x
  3. Step 3: Cross multiply
    480.96x = 663.66 × 284.40
  4. Step 4: Simplify right side
    480.96x = 188,744.90
  5. Step 5: Solve for x
    x = 188,744.90/480.96
  6. Step 6: Final answer
    x = 392.43

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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.