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Finding the Fourth Proportional to 626.44, 939.80 and 193.64

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Solution

The fourth proportional to 626.44, 939.80 and 193.64 is: 290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.44 : 939.80 = 193.64 : x
  2. Step 2: Convert to fraction form
    626.44/939.80 = 193.64/x
  3. Step 3: Cross multiply
    626.44x = 939.80 × 193.64
  4. Step 4: Simplify right side
    626.44x = 181,982.87
  5. Step 5: Solve for x
    x = 181,982.87/626.44
  6. Step 6: Final answer
    x = 290.50

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1.5x scale

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.