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Finding the Fourth Proportional to 872.44, 1,302.82 and 717.93

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Solution

The fourth proportional to 872.44, 1,302.82 and 717.93 is: 1,072.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.44 : 1,302.82 = 717.93 : x
  2. Step 2: Convert to fraction form
    872.44/1,302.82 = 717.93/x
  3. Step 3: Cross multiply
    872.44x = 1,302.82 × 717.93
  4. Step 4: Simplify right side
    872.44x = 935,331.77
  5. Step 5: Solve for x
    x = 935,331.77/872.44
  6. Step 6: Final answer
    x = 1,072.09

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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.