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Finding the Fourth Proportional to 628.37, 867.09 and 348.63

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Solution

The fourth proportional to 628.37, 867.09 and 348.63 is: 481.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.37 : 867.09 = 348.63 : x
  2. Step 2: Convert to fraction form
    628.37/867.09 = 348.63/x
  3. Step 3: Cross multiply
    628.37x = 867.09 × 348.63
  4. Step 4: Simplify right side
    628.37x = 302,293.59
  5. Step 5: Solve for x
    x = 302,293.59/628.37
  6. Step 6: Final answer
    x = 481.08

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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.