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Finding the Fourth Proportional to 826.36, 1,237.12 and 517.22

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Solution

The fourth proportional to 826.36, 1,237.12 and 517.22 is: 774.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.36 : 1,237.12 = 517.22 : x
  2. Step 2: Convert to fraction form
    826.36/1,237.12 = 517.22/x
  3. Step 3: Cross multiply
    826.36x = 1,237.12 × 517.22
  4. Step 4: Simplify right side
    826.36x = 639,863.21
  5. Step 5: Solve for x
    x = 639,863.21/826.36
  6. Step 6: Final answer
    x = 774.32

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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.