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Finding the Fourth Proportional to 628.95, 868.01 and 349.28

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Solution

The fourth proportional to 628.95, 868.01 and 349.28 is: 482.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.95 : 868.01 = 349.28 : x
  2. Step 2: Convert to fraction form
    628.95/868.01 = 349.28/x
  3. Step 3: Cross multiply
    628.95x = 868.01 × 349.28
  4. Step 4: Simplify right side
    628.95x = 303,172.45
  5. Step 5: Solve for x
    x = 303,172.45/628.95
  6. Step 6: Final answer
    x = 482.03

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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.