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Finding the Fourth Proportional to 923.99, 1,274.66 and 550.85

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Solution

The fourth proportional to 923.99, 1,274.66 and 550.85 is: 759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.99 : 1,274.66 = 550.85 : x
  2. Step 2: Convert to fraction form
    923.99/1,274.66 = 550.85/x
  3. Step 3: Cross multiply
    923.99x = 1,274.66 × 550.85
  4. Step 4: Simplify right side
    923.99x = 702,146.46
  5. Step 5: Solve for x
    x = 702,146.46/923.99
  6. Step 6: Final answer
    x = 759.91

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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.