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Finding the Fourth Proportional to 626.12, 939.18 and 193.28

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Solution

The fourth proportional to 626.12, 939.18 and 193.28 is: 289.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.12 : 939.18 = 193.28 : x
  2. Step 2: Convert to fraction form
    626.12/939.18 = 193.28/x
  3. Step 3: Cross multiply
    626.12x = 939.18 × 193.28
  4. Step 4: Simplify right side
    626.12x = 181,520.01
  5. Step 5: Solve for x
    x = 181,520.01/626.12
  6. Step 6: Final answer
    x = 289.91

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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.