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Finding the Fourth Proportional to 826.25, 1,139.81 and 604.71

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Solution

The fourth proportional to 826.25, 1,139.81 and 604.71 is: 834.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.25 : 1,139.81 = 604.71 : x
  2. Step 2: Convert to fraction form
    826.25/1,139.81 = 604.71/x
  3. Step 3: Cross multiply
    826.25x = 1,139.81 × 604.71
  4. Step 4: Simplify right side
    826.25x = 689,251.48
  5. Step 5: Solve for x
    x = 689,251.48/826.25
  6. Step 6: Final answer
    x = 834.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.