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Finding the Fourth Proportional to 626.75, 940.08 and 215.89

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Solution

The fourth proportional to 626.75, 940.08 and 215.89 is: 323.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.75 : 940.08 = 215.89 : x
  2. Step 2: Convert to fraction form
    626.75/940.08 = 215.89/x
  3. Step 3: Cross multiply
    626.75x = 940.08 × 215.89
  4. Step 4: Simplify right side
    626.75x = 202,953.87
  5. Step 5: Solve for x
    x = 202,953.87/626.75
  6. Step 6: Final answer
    x = 323.82

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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.