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Finding the Fourth Proportional to 923.39, 1,274.28 and 550.58

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Solution

The fourth proportional to 923.39, 1,274.28 and 550.58 is: 759.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.39 : 1,274.28 = 550.58 : x
  2. Step 2: Convert to fraction form
    923.39/1,274.28 = 550.58/x
  3. Step 3: Cross multiply
    923.39x = 1,274.28 × 550.58
  4. Step 4: Simplify right side
    923.39x = 701,591.27
  5. Step 5: Solve for x
    x = 701,591.27/923.39
  6. Step 6: Final answer
    x = 759.80

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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.