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Finding the Fourth Proportional to 626.58, 939.78 and 453.56

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Solution

The fourth proportional to 626.58, 939.78 and 453.56 is: 680.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.58 : 939.78 = 453.56 : x
  2. Step 2: Convert to fraction form
    626.58/939.78 = 453.56/x
  3. Step 3: Cross multiply
    626.58x = 939.78 × 453.56
  4. Step 4: Simplify right side
    626.58x = 426,241.92
  5. Step 5: Solve for x
    x = 426,241.92/626.58
  6. Step 6: Final answer
    x = 680.27

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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.