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Finding the Fourth Proportional to 826.58, 1,240.35 and 306.94

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Solution

The fourth proportional to 826.58, 1,240.35 and 306.94 is: 460.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.58 : 1,240.35 = 306.94 : x
  2. Step 2: Convert to fraction form
    826.58/1,240.35 = 306.94/x
  3. Step 3: Cross multiply
    826.58x = 1,240.35 × 306.94
  4. Step 4: Simplify right side
    826.58x = 380,713.69
  5. Step 5: Solve for x
    x = 380,713.69/826.58
  6. Step 6: Final answer
    x = 460.59

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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.