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Finding the Fourth Proportional to 757.79, 1,136.90 and 270.89

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Solution

The fourth proportional to 757.79, 1,136.90 and 270.89 is: 406.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.79 : 1,136.90 = 270.89 : x
  2. Step 2: Convert to fraction form
    757.79/1,136.90 = 270.89/x
  3. Step 3: Cross multiply
    757.79x = 1,136.90 × 270.89
  4. Step 4: Simplify right side
    757.79x = 307,974.84
  5. Step 5: Solve for x
    x = 307,974.84/757.79
  6. Step 6: Final answer
    x = 406.41

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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.