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Finding the Fourth Proportional to 628.55, 867.48 and 481.13

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Solution

The fourth proportional to 628.55, 867.48 and 481.13 is: 664.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.55 : 867.48 = 481.13 : x
  2. Step 2: Convert to fraction form
    628.55/867.48 = 481.13/x
  3. Step 3: Cross multiply
    628.55x = 867.48 × 481.13
  4. Step 4: Simplify right side
    628.55x = 417,370.65
  5. Step 5: Solve for x
    x = 417,370.65/628.55
  6. Step 6: Final answer
    x = 664.02

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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.