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Finding the Fourth Proportional to 826.98, 1,141.28 and 495.40

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Solution

The fourth proportional to 826.98, 1,141.28 and 495.40 is: 683.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    826.98 : 1,141.28 = 495.40 : x
  2. Step 2: Convert to fraction form
    826.98/1,141.28 = 495.40/x
  3. Step 3: Cross multiply
    826.98x = 1,141.28 × 495.40
  4. Step 4: Simplify right side
    826.98x = 565,390.11
  5. Step 5: Solve for x
    x = 565,390.11/826.98
  6. Step 6: Final answer
    x = 683.68

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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.