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Finding the Fourth Proportional to 971.24, 1,455.50 and 826.38

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Solution

The fourth proportional to 971.24, 1,455.50 and 826.38 is: 1,238.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.24 : 1,455.50 = 826.38 : x
  2. Step 2: Convert to fraction form
    971.24/1,455.50 = 826.38/x
  3. Step 3: Cross multiply
    971.24x = 1,455.50 × 826.38
  4. Step 4: Simplify right side
    971.24x = 1,202,791.96
  5. Step 5: Solve for x
    x = 1,202,791.96/971.24
  6. Step 6: Final answer
    x = 1,238.41

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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.