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Finding the Fourth Proportional to 480.75, 663.73 and 315.24

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Solution

The fourth proportional to 480.75, 663.73 and 315.24 is: 435.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.75 : 663.73 = 315.24 : x
  2. Step 2: Convert to fraction form
    480.75/663.73 = 315.24/x
  3. Step 3: Cross multiply
    480.75x = 663.73 × 315.24
  4. Step 4: Simplify right side
    480.75x = 209,234.25
  5. Step 5: Solve for x
    x = 209,234.25/480.75
  6. Step 6: Final answer
    x = 435.22

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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.