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Finding the Fourth Proportional to 826.94, 1,240.90 and 306.85

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Solution

The fourth proportional to 826.94, 1,240.90 and 306.85 is: 460.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.94 : 1,240.90 = 306.85 : x
  2. Step 2: Convert to fraction form
    826.94/1,240.90 = 306.85/x
  3. Step 3: Cross multiply
    826.94x = 1,240.90 × 306.85
  4. Step 4: Simplify right side
    826.94x = 380,770.17
  5. Step 5: Solve for x
    x = 380,770.17/826.94
  6. Step 6: Final answer
    x = 460.46

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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.