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Finding the Fourth Proportional to 757.09, 1,135.92 and 515.89

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Solution

The fourth proportional to 757.09, 1,135.92 and 515.89 is: 774.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.09 : 1,135.92 = 515.89 : x
  2. Step 2: Convert to fraction form
    757.09/1,135.92 = 515.89/x
  3. Step 3: Cross multiply
    757.09x = 1,135.92 × 515.89
  4. Step 4: Simplify right side
    757.09x = 586,009.77
  5. Step 5: Solve for x
    x = 586,009.77/757.09
  6. Step 6: Final answer
    x = 774.03

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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.