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Finding the Fourth Proportional to 628.50, 867.33 and 481.30

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Solution

The fourth proportional to 628.50, 867.33 and 481.30 is: 664.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.50 : 867.33 = 481.30 : x
  2. Step 2: Convert to fraction form
    628.50/867.33 = 481.30/x
  3. Step 3: Cross multiply
    628.50x = 867.33 × 481.30
  4. Step 4: Simplify right side
    628.50x = 417,445.93
  5. Step 5: Solve for x
    x = 417,445.93/628.50
  6. Step 6: Final answer
    x = 664.19

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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.