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Finding the Fourth Proportional to 826.84, 1,246.39 and 684.28

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Solution

The fourth proportional to 826.84, 1,246.39 and 684.28 is: 1,031.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.84 : 1,246.39 = 684.28 : x
  2. Step 2: Convert to fraction form
    826.84/1,246.39 = 684.28/x
  3. Step 3: Cross multiply
    826.84x = 1,246.39 × 684.28
  4. Step 4: Simplify right side
    826.84x = 852,879.75
  5. Step 5: Solve for x
    x = 852,879.75/826.84
  6. Step 6: Final answer
    x = 1,031.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.