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Finding the Fourth Proportional to 829.14, 1,144.70 and 745.08

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Solution

The fourth proportional to 829.14, 1,144.70 and 745.08 is: 1,028.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.14 : 1,144.70 = 745.08 : x
  2. Step 2: Convert to fraction form
    829.14/1,144.70 = 745.08/x
  3. Step 3: Cross multiply
    829.14x = 1,144.70 × 745.08
  4. Step 4: Simplify right side
    829.14x = 852,893.08
  5. Step 5: Solve for x
    x = 852,893.08/829.14
  6. Step 6: Final answer
    x = 1,028.65

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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.