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Finding the Fourth Proportional to 769.47, 1,149.71 and 675.73

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Solution

The fourth proportional to 769.47, 1,149.71 and 675.73 is: 1,009.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.47 : 1,149.71 = 675.73 : x
  2. Step 2: Convert to fraction form
    769.47/1,149.71 = 675.73/x
  3. Step 3: Cross multiply
    769.47x = 1,149.71 × 675.73
  4. Step 4: Simplify right side
    769.47x = 776,893.54
  5. Step 5: Solve for x
    x = 776,893.54/769.47
  6. Step 6: Final answer
    x = 1,009.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.