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Finding the Fourth Proportional to 757.17, 1,135.72 and 209.38

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Solution

The fourth proportional to 757.17, 1,135.72 and 209.38 is: 314.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.17 : 1,135.72 = 209.38 : x
  2. Step 2: Convert to fraction form
    757.17/1,135.72 = 209.38/x
  3. Step 3: Cross multiply
    757.17x = 1,135.72 × 209.38
  4. Step 4: Simplify right side
    757.17x = 237,797.05
  5. Step 5: Solve for x
    x = 237,797.05/757.17
  6. Step 6: Final answer
    x = 314.06

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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.