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Finding the Fourth Proportional to 872.84, 1,302.87 and 758.09

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Solution

The fourth proportional to 872.84, 1,302.87 and 758.09 is: 1,131.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.84 : 1,302.87 = 758.09 : x
  2. Step 2: Convert to fraction form
    872.84/1,302.87 = 758.09/x
  3. Step 3: Cross multiply
    872.84x = 1,302.87 × 758.09
  4. Step 4: Simplify right side
    872.84x = 987,694.55
  5. Step 5: Solve for x
    x = 987,694.55/872.84
  6. Step 6: Final answer
    x = 1,131.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.