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Finding the Fourth Proportional to 626.76, 939.33 and 407.34

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Solution

The fourth proportional to 626.76, 939.33 and 407.34 is: 610.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.76 : 939.33 = 407.34 : x
  2. Step 2: Convert to fraction form
    626.76/939.33 = 407.34/x
  3. Step 3: Cross multiply
    626.76x = 939.33 × 407.34
  4. Step 4: Simplify right side
    626.76x = 382,626.68
  5. Step 5: Solve for x
    x = 382,626.68/626.76
  6. Step 6: Final answer
    x = 610.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.