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Finding the Fourth Proportional to 757.29, 1,135.95 and 209.46

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Solution

The fourth proportional to 757.29, 1,135.95 and 209.46 is: 314.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.29 : 1,135.95 = 209.46 : x
  2. Step 2: Convert to fraction form
    757.29/1,135.95 = 209.46/x
  3. Step 3: Cross multiply
    757.29x = 1,135.95 × 209.46
  4. Step 4: Simplify right side
    757.29x = 237,936.09
  5. Step 5: Solve for x
    x = 237,936.09/757.29
  6. Step 6: Final answer
    x = 314.19

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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.