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Finding the Fourth Proportional to 626.12, 939.63 and 260.96

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Solution

The fourth proportional to 626.12, 939.63 and 260.96 is: 391.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.12 : 939.63 = 260.96 : x
  2. Step 2: Convert to fraction form
    626.12/939.63 = 260.96/x
  3. Step 3: Cross multiply
    626.12x = 939.63 × 260.96
  4. Step 4: Simplify right side
    626.12x = 245,205.84
  5. Step 5: Solve for x
    x = 245,205.84/626.12
  6. Step 6: Final answer
    x = 391.63

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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.