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Finding the Fourth Proportional to 826.64, 1,238.96 and 581.84

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Solution

The fourth proportional to 826.64, 1,238.96 and 581.84 is: 872.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.64 : 1,238.96 = 581.84 : x
  2. Step 2: Convert to fraction form
    826.64/1,238.96 = 581.84/x
  3. Step 3: Cross multiply
    826.64x = 1,238.96 × 581.84
  4. Step 4: Simplify right side
    826.64x = 720,876.49
  5. Step 5: Solve for x
    x = 720,876.49/826.64
  6. Step 6: Final answer
    x = 872.06

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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.