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Finding the Fourth Proportional to 480.75, 663.19 and 314.97

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Solution

The fourth proportional to 480.75, 663.19 and 314.97 is: 434.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.75 : 663.19 = 314.97 : x
  2. Step 2: Convert to fraction form
    480.75/663.19 = 314.97/x
  3. Step 3: Cross multiply
    480.75x = 663.19 × 314.97
  4. Step 4: Simplify right side
    480.75x = 208,884.95
  5. Step 5: Solve for x
    x = 208,884.95/480.75
  6. Step 6: Final answer
    x = 434.50

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Find fourth proportional to 240.38, 331.60 and 157.49
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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.