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Finding the Fourth Proportional to 769.43, 1,152.65 and 730.07

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Solution

The fourth proportional to 769.43, 1,152.65 and 730.07 is: 1,093.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.43 : 1,152.65 = 730.07 : x
  2. Step 2: Convert to fraction form
    769.43/1,152.65 = 730.07/x
  3. Step 3: Cross multiply
    769.43x = 1,152.65 × 730.07
  4. Step 4: Simplify right side
    769.43x = 841,511.54
  5. Step 5: Solve for x
    x = 841,511.54/769.43
  6. Step 6: Final answer
    x = 1,093.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.