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Finding the Fourth Proportional to 628.94, 867.85 and 349.13

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Solution

The fourth proportional to 628.94, 867.85 and 349.13 is: 481.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.94 : 867.85 = 349.13 : x
  2. Step 2: Convert to fraction form
    628.94/867.85 = 349.13/x
  3. Step 3: Cross multiply
    628.94x = 867.85 × 349.13
  4. Step 4: Simplify right side
    628.94x = 302,993.77
  5. Step 5: Solve for x
    x = 302,993.77/628.94
  6. Step 6: Final answer
    x = 481.75

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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.