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Finding the Fourth Proportional to 826.66, 1,240.26 and 340.66

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Solution

The fourth proportional to 826.66, 1,240.26 and 340.66 is: 511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.66 : 1,240.26 = 340.66 : x
  2. Step 2: Convert to fraction form
    826.66/1,240.26 = 340.66/x
  3. Step 3: Cross multiply
    826.66x = 1,240.26 × 340.66
  4. Step 4: Simplify right side
    826.66x = 422,506.97
  5. Step 5: Solve for x
    x = 422,506.97/826.66
  6. Step 6: Final answer
    x = 511.10

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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.