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Finding the Fourth Proportional to 480.92, 664.39 and 315.52

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Solution

The fourth proportional to 480.92, 664.39 and 315.52 is: 435.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.92 : 664.39 = 315.52 : x
  2. Step 2: Convert to fraction form
    480.92/664.39 = 315.52/x
  3. Step 3: Cross multiply
    480.92x = 664.39 × 315.52
  4. Step 4: Simplify right side
    480.92x = 209,627.07
  5. Step 5: Solve for x
    x = 209,627.07/480.92
  6. Step 6: Final answer
    x = 435.89

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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.