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Finding the Fourth Proportional to 923.92, 1,274.45 and 550.65

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Solution

The fourth proportional to 923.92, 1,274.45 and 550.65 is: 759.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.92 : 1,274.45 = 550.65 : x
  2. Step 2: Convert to fraction form
    923.92/1,274.45 = 550.65/x
  3. Step 3: Cross multiply
    923.92x = 1,274.45 × 550.65
  4. Step 4: Simplify right side
    923.92x = 701,775.89
  5. Step 5: Solve for x
    x = 701,775.89/923.92
  6. Step 6: Final answer
    x = 759.56

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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.